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          "error": "Alto relative pointer out of range: 9216",
          "first_extension_descriptor_index": 9216,
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          "initial_xw": 18432
        },
        {
          "code": 4,
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      "omitted_character_codes": [
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        4
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      "recovery_kind": "character-pointer",
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    {
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        {
          "code": 3,
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          "first_extension_descriptor_index": 9216,
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        4
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      "recovery_kind": "character-pointer",
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        4
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      "recovery_kind": "character-pointer",
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    {
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      "outputs": {
        "bdf": "bdf/blkf10-al-ar1.bdf",
        "sheet": "sheets/blkf10-al-ar1.png"
      },
      "raster_height": 14,
      "source": "ar1.1:BLKF10 1",
      "source_format": "Xerox Alto CONVERT font source (AL) recovered from MIT CADR AR1 ARC!!!",
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        },
        "variant_label": "AL-AR1",
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        "vertical_overflow_codes": [],
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      },
      "outputs": {
        "bdf": "bdf/cha-al-ar1.bdf",
        "sheet": "sheets/cha-al-ar1.png"
      },
      "raster_height": 14,
      "source": "ar1.1:CHA 1",
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        },
        "variant_label": "AL-AR1",
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      "outputs": {
        "bdf": "bdf/chas-al-ar1.bdf",
        "sheet": "sheets/chas-al-ar1.png"
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      "raster_height": 14,
      "source": "ar1.1:CHAS 1",
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        },
        "variant_label": "AL-AR1",
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      "outputs": {
        "bdf": "bdf/clar-al-ar1.bdf",
        "sheet": "sheets/clar-al-ar1.png"
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      "raster_height": 14,
      "source": "ar1.1:CLAR 3",
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      "outputs": {
        "bdf": "bdf/clar12-al-ar1.bdf",
        "sheet": "sheets/clar12-al-ar1.png"
      },
      "raster_height": 12,
      "source": "ar1.1:CLAR12 1",
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      "outputs": {
        "bdf": "bdf/clar14-al-ar1.bdf",
        "sheet": "sheets/clar14-al-ar1.png"
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      "raster_height": 14,
      "source": "ar1.1:CLAR14 2",
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        },
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      "outputs": {
        "bdf": "bdf/clarb-al-ar1.bdf",
        "sheet": "sheets/clarb-al-ar1.png"
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      "source": "ar1.1:CLARB 4",
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        },
        "variant_label": "AL-AR1",
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      "outputs": {
        "bdf": "bdf/clargk-al-ar1.bdf",
        "sheet": "sheets/clargk-al-ar1.png"
      },
      "raster_height": 15,
      "source": "ar1.1:CLARGK 1",
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        },
        "variant_label": "AL-AR1",
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      },
      "outputs": {
        "bdf": "bdf/clre14.bdf",
        "sheet": "sheets/clre14.png"
      },
      "raster_height": 14,
      "source": "ar1.1:CLRE14 1",
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      "outputs": {
        "bdf": "bdf/cyr12-al-ar1.bdf",
        "sheet": "sheets/cyr12-al-ar1.png"
      },
      "raster_height": 15,
      "source": "ar1.1:CYR12 1",
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        },
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        "vertical_overflow_codes": [],
        "vertical_overflows": {}
      },
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        "bdf": "bdf/gach10-al-ar1.bdf",
        "sheet": "sheets/gach10-al-ar1.png"
      },
      "raster_height": 12,
      "source": "ar1.1:GACH10 1",
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        "bdf": "bdf/gach12-al-ar1.bdf",
        "sheet": "sheets/gach12-al-ar1.png"
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      "source": "ar1.1:GACH12 1",
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      "outputs": {
        "bdf": "bdf/gacha8-al-ar1.bdf",
        "sheet": "sheets/gacha8-al-ar1.png"
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      "raster_height": 10,
      "source": "ar1.1:GACHA8 1",
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        "bdf": "bdf/gates3-al-ar1.bdf",
        "sheet": "sheets/gates3-al-ar1.png"
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      "source": "ar1.1:GATES3 1",
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        "bdf": "bdf/gats3a-al-ar1.bdf",
        "sheet": "sheets/gats3a-al-ar1.png"
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      "outputs": {
        "bdf": "bdf/hip10a-al-ar1.bdf",
        "sheet": "sheets/hip10a-al-ar1.png"
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      "source": "ar1.1:HIP10A 1",
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        "bdf": "bdf/hipo10-al-ar1.bdf",
        "sheet": "sheets/hipo10-al-ar1.png"
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      "raster_height": 15,
      "source": "ar1.1:HIPO10 1",
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      "outputs": {
        "bdf": "bdf/hl10-al-ar1.bdf",
        "sheet": "sheets/hl10-al-ar1.png"
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      "source": "ar1.1:HL10 1",
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      "outputs": {
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        "sheet": "sheets/hl10b-al-ar1.png"
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      "raster_height": 12,
      "source": "ar1.1:HL10B 1",
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      "outputs": {
        "bdf": "bdf/hl12-al-ar1.bdf",
        "sheet": "sheets/hl12-al-ar1.png"
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      "source": "ar1.1:HL12 1",
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        "bdf": "bdf/hl12i-al-ar1.bdf",
        "sheet": "sheets/hl12i-al-ar1.png"
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      "raster_height": 14,
      "source": "ar1.1:HL12I 1",
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      "outputs": {
        "bdf": "bdf/hl14-al-ar1.bdf",
        "sheet": "sheets/hl14-al-ar1.png"
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      "raster_height": 15,
      "source": "ar1.1:HL14 1",
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        },
        "variant_label": "AL-AR1",
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      },
      "outputs": {
        "bdf": "bdf/musc10-al-ar1.bdf",
        "sheet": "sheets/musc10-al-ar1.png"
      },
      "raster_height": 17,
      "source": "ar1.1:MUSC10 1",
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    {
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      "outputs": {
        "bdf": "bdf/plnk16-al-ar1.bdf",
        "sheet": "sheets/plnk16-al-ar1.png"
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      "raster_height": 16,
      "source": "ar1.1:PLNK16 1",
      "source_format": "Xerox Alto CONVERT font source (AL) recovered from MIT CADR AR1 ARC!!!",
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      "variant_of": "PLNK16"
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        "variant_label": "AL-AR1",
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      "outputs": {
        "bdf": "bdf/prnt10-al-ar1.bdf",
        "sheet": "sheets/prnt10-al-ar1.png"
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      "raster_height": 16,
      "source": "ar1.1:PRNT10 1",
      "source_format": "Xerox Alto CONVERT font source (AL) recovered from MIT CADR AR1 ARC!!!",
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        ],
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      "outputs": {
        "bdf": "bdf/pronto.bdf",
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      "raster_height": 10,
      "source": "ar1.1:PRONTO 2",
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      "outputs": {
        "bdf": "bdf/prt12b-al-ar1.bdf",
        "sheet": "sheets/prt12b-al-ar1.png"
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      "raster_height": 15,
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      "outputs": {
        "bdf": "bdf/smt10-al-ar1.bdf",
        "sheet": "sheets/smt10-al-ar1.png"
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      "raster_height": 10,
      "source": "ar1.1:SMT10 1",
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      "outputs": {
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        "sheet": "sheets/smt14a-al-ar1.png"
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      "raster_height": 14,
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      "outputs": {
        "bdf": "bdf/st10-al-ar1.bdf",
        "sheet": "sheets/st10-al-ar1.png"
      },
      "raster_height": 14,
      "source": "ar1.1:ST10 1",
      "source_format": "Xerox Alto CONVERT font source (AL) recovered from MIT CADR AR1 ARC!!!",
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        },
        "variant_label": "AL-AR1",
        "variant_source_format": "AL-AR1",
        "vertical_overflow_codes": [],
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      },
      "outputs": {
        "bdf": "bdf/st6-al-ar1.bdf",
        "sheet": "sheets/st6-al-ar1.png"
      },
      "raster_height": 10,
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        "extent_recovery_required": true,
        "historical_loader_extent_status": "recovery-required",
        "horizontal_overhang_codes": [
          24
        ],
        "logical_name": "TR18",
        "omitted_character_codes": [],
        "pdp10_word_sha256": "b93eadd9accfb9226b58482a43c35b9bcfca9b1c277bd3d3778eb88912f0f777",
        "raster_overhangs": {
          "24": [
            0,
            1,
            2,
            3,
            4,
            5,
            6,
            7,
            8,
            9,
            10,
            11,
            12,
            13,
            14,
            15
          ]
        },
        "variant_label": "AL-AR1",
        "variant_source_format": "AL-AR1",
        "vertical_overflow_codes": [],
        "vertical_overflows": {}
      },
      "outputs": {
        "bdf": "bdf/tr18-al-ar1.bdf",
        "sheet": "sheets/tr18-al-ar1.png"
      },
      "raster_height": 20,
      "source": "ar1.1:TR18 1",
      "source_format": "Xerox Alto CONVERT font source (AL) recovered from MIT CADR AR1 ARC!!!",
      "source_sha256": "35b02ab6842c2df7268d22d9ad4a06ada3467679ee43a2f4f73886060e4ae496",
      "variant_of": "TR18"
    },
    {
      "baseline": 7,
      "character_height": 10,
      "container_source": "ar1.1",
      "glyph_count": 128,
      "logical_name": "TR8",
      "name": "TR8-AL-AR1",
      "observations": {
        "alto_byte_sha256": "524eb749a208da0e9a3251706e538f26b44ff8cdf85781ca5a71df38873bfd1a",
        "archive_directory_word": 1009,
        "archive_member_sha256": "225157ff5df35ba381a88a1b45520d55833925b2443a1056e8d1b2e09dde1235",
        "archive_second_name": "1",
        "character_errors": [],
        "character_pointer_integrity": "complete",
        "declared_max_width": 12,
        "extent_recovery_required": true,
        "historical_loader_extent_status": "recovery-required",
        "horizontal_overhang_codes": [
          24,
          97,
          102
        ],
        "logical_name": "TR8",
        "omitted_character_codes": [],
        "pdp10_word_sha256": "225157ff5df35ba381a88a1b45520d55833925b2443a1056e8d1b2e09dde1235",
        "raster_overhangs": {
          "102": [
            4
          ],
          "24": [
            0,
            1,
            2,
            3,
            4,
            5,
            6,
            7,
            8,
            9,
            10,
            11
          ],
          "97": [
            5
          ]
        },
        "variant_label": "AL-AR1",
        "variant_source_format": "AL-AR1",
        "vertical_overflow_codes": [],
        "vertical_overflows": {}
      },
      "outputs": {
        "bdf": "bdf/tr8-al-ar1.bdf",
        "sheet": "sheets/tr8-al-ar1.png"
      },
      "raster_height": 10,
      "source": "ar1.1:TR8 1",
      "source_format": "Xerox Alto CONVERT font source (AL) recovered from MIT CADR AR1 ARC!!!",
      "source_sha256": "35b02ab6842c2df7268d22d9ad4a06ada3467679ee43a2f4f73886060e4ae496",
      "variant_of": "TR8"
    },
    {
      "baseline": 7,
      "character_height": 11,
      "container_source": "ar1.1",
      "glyph_count": 128,
      "logical_name": "TR8B",
      "name": "TR8B-AL-AR1",
      "observations": {
        "alto_byte_sha256": "16d8e8cf780530e6afb73ae89bcd9df1526829cefd0da0a83499af81202e923c",
        "archive_directory_word": 1014,
        "archive_member_sha256": "1bf3527f2be17bfa77e65652fdbf212c927e5038dff044c3fd0b2b053cc3d3a2",
        "archive_second_name": "1",
        "character_errors": [],
        "character_pointer_integrity": "complete",
        "declared_max_width": 13,
        "extent_recovery_required": true,
        "historical_loader_extent_status": "recovery-required",
        "horizontal_overhang_codes": [
          24
        ],
        "logical_name": "TR8B",
        "omitted_character_codes": [],
        "pdp10_word_sha256": "1bf3527f2be17bfa77e65652fdbf212c927e5038dff044c3fd0b2b053cc3d3a2",
        "raster_overhangs": {
          "24": [
            0,
            1,
            2,
            3,
            4,
            5,
            6,
            7,
            8,
            9,
            10,
            11,
            12
          ]
        },
        "variant_label": "AL-AR1",
        "variant_source_format": "AL-AR1",
        "vertical_overflow_codes": [],
        "vertical_overflows": {}
      },
      "outputs": {
        "bdf": "bdf/tr8b-al-ar1.bdf",
        "sheet": "sheets/tr8b-al-ar1.png"
      },
      "raster_height": 11,
      "source": "ar1.1:TR8B 1",
      "source_format": "Xerox Alto CONVERT font source (AL) recovered from MIT CADR AR1 ARC!!!",
      "source_sha256": "35b02ab6842c2df7268d22d9ad4a06ada3467679ee43a2f4f73886060e4ae496",
      "variant_of": "TR8B"
    },
    {
      "baseline": 7,
      "character_height": 10,
      "container_source": "ar1.1",
      "glyph_count": 128,
      "logical_name": "TR8I",
      "name": "TR8I-AL-AR1",
      "observations": {
        "alto_byte_sha256": "62cd7fd26cb78e8f93e5225f0c9c327d6ae6dea3ec2b21fac4959ca07e67dc4b",
        "archive_directory_word": 1019,
        "archive_member_sha256": "0e1436a7bceeb05a01896ea5efcca9e00da0f6f74d60733612a22c1e956bba59",
        "archive_second_name": "1",
        "character_errors": [],
        "character_pointer_integrity": "complete",
        "declared_max_width": 12,
        "extent_recovery_required": true,
        "historical_loader_extent_status": "recovery-required",
        "horizontal_overhang_codes": [
          100,
          102
        ],
        "logical_name": "TR8I",
        "omitted_character_codes": [],
        "pdp10_word_sha256": "0e1436a7bceeb05a01896ea5efcca9e00da0f6f74d60733612a22c1e956bba59",
        "raster_overhangs": {
          "100": [
            6
          ],
          "102": [
            6,
            7
          ]
        },
        "variant_label": "AL-AR1",
        "variant_source_format": "AL-AR1",
        "vertical_overflow_codes": [],
        "vertical_overflows": {}
      },
      "outputs": {
        "bdf": "bdf/tr8i-al-ar1.bdf",
        "sheet": "sheets/tr8i-al-ar1.png"
      },
      "raster_height": 10,
      "source": "ar1.1:TR8I 1",
      "source_format": "Xerox Alto CONVERT font source (AL) recovered from MIT CADR AR1 ARC!!!",
      "source_sha256": "35b02ab6842c2df7268d22d9ad4a06ada3467679ee43a2f4f73886060e4ae496",
      "variant_of": "TR8I"
    }
  ],
  "logical_font_count": 88,
  "method": "public source representations only; no load band or heap",
  "partial_recoveries": [
    {
      "character_errors": [
        {
          "code": 3,
          "code_octal": "003",
          "directory_relative_pointer": 284,
          "error": "Alto relative pointer out of range: 9216",
          "first_extension_descriptor_index": 9216,
          "initial_descriptor_index": 287,
          "initial_xw": 18432
        },
        {
          "code": 4,
          "code_octal": "004",
          "directory_relative_pointer": 3432,
          "error": "Alto relative pointer out of range: 3436",
          "initial_descriptor_index": 3436
        }
      ],
      "logical_name": "CLARGK",
      "name": "CLARGK-AL-AR1",
      "omitted_character_codes": [
        3,
        4
      ],
      "recovery_kind": "character-pointer",
      "source": "ar1.1:CLARGK 1"
    },
    {
      "character_errors": [
        {
          "code": 3,
          "code_octal": "003",
          "directory_relative_pointer": 284,
          "error": "Alto relative pointer out of range: 9216",
          "first_extension_descriptor_index": 9216,
          "initial_descriptor_index": 287,
          "initial_xw": 18432
        },
        {
          "code": 4,
          "code_octal": "004",
          "directory_relative_pointer": 3432,
          "error": "Alto relative pointer out of range: 3436",
          "initial_descriptor_index": 3436
        }
      ],
      "logical_name": "HIP10A",
      "name": "HIP10A-AL-AR1",
      "omitted_character_codes": [
        3,
        4
      ],
      "recovery_kind": "character-pointer",
      "source": "ar1.1:HIP10A 1"
    },
    {
      "character_errors": [
        {
          "code": 1,
          "code_octal": "001",
          "directory_relative_pointer": 271,
          "error": "Alto relative pointer out of range: 2296",
          "first_extension_descriptor_index": 2296,
          "initial_descriptor_index": 272,
          "initial_xw": 4592
        }
      ],
      "logical_name": "PRNT10",
      "name": "PRNT10-AL-AR1",
      "omitted_character_codes": [
        1
      ],
      "recovery_kind": "character-pointer",
      "source": "ar1.1:PRNT10 1"
    },
    {
      "character_errors": [
        {
          "code": 3,
          "code_octal": "003",
          "directory_relative_pointer": 284,
          "error": "Alto relative pointer out of range: 31744",
          "first_extension_descriptor_index": 31744,
          "initial_descriptor_index": 287,
          "initial_xw": 63488
        }
      ],
      "logical_name": "PRONTO",
      "name": "PRONTO",
      "omitted_character_codes": [
        3
      ],
      "recovery_kind": "character-pointer",
      "source": "ar1.1:PRONTO 2"
    },
    {
      "character_errors": [
        {
          "code": 1,
          "code_octal": "001",
          "directory_relative_pointer": 271,
          "error": "Alto relative pointer out of range: 2296",
          "first_extension_descriptor_index": 2296,
          "initial_descriptor_index": 272,
          "initial_xw": 4592
        }
      ],
      "logical_name": "PRT12B",
      "name": "PRT12B-AL-AR1",
      "omitted_character_codes": [
        1
      ],
      "recovery_kind": "character-pointer",
      "source": "ar1.1:PRT12B 1"
    },
    {
      "character_errors": [
        {
          "code": 3,
          "code_octal": "003",
          "directory_relative_pointer": 284,
          "error": "Alto relative pointer out of range: 1792",
          "first_extension_descriptor_index": 1792,
          "initial_descriptor_index": 287,
          "initial_xw": 3584
        },
        {
          "code": 4,
          "code_octal": "004",
          "directory_relative_pointer": 1243,
          "error": "Alto relative pointer out of range: 11520",
          "first_extension_descriptor_index": 11520,
          "initial_descriptor_index": 1247,
          "initial_xw": 23040
        }
      ],
      "logical_name": "SMT14A",
      "name": "SMT14A-AL-AR1",
      "omitted_character_codes": [
        3,
        4
      ],
      "recovery_kind": "character-pointer",
      "source": "ar1.1:SMT14A 1"
    }
  ],
  "partial_recovery_count": 6,
  "rejected_sources": [],
  "schema_version": 2,
  "source_directory": "lmfont",
  "source_license_copy": "LICENSE.source",
  "variant_count": 62
}
