/usr/share/doc/libfreetype6/reference/ is in libfreetype6-dev 2.5.2-1ubuntu2.8.
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/usr/share/doc/libfreetype6/reference/ft2-auto_hinter.html
/usr/share/doc/libfreetype6/reference/ft2-base_interface.html
/usr/share/doc/libfreetype6/reference/ft2-basic_types.html
/usr/share/doc/libfreetype6/reference/ft2-bdf_fonts.html
/usr/share/doc/libfreetype6/reference/ft2-bitmap_handling.html
/usr/share/doc/libfreetype6/reference/ft2-bzip2.html
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/usr/share/doc/libfreetype6/reference/ft2-cid_fonts.html
/usr/share/doc/libfreetype6/reference/ft2-computations.html
/usr/share/doc/libfreetype6/reference/ft2-font_formats.html
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/usr/share/doc/libfreetype6/reference/ft2-glyph_management.html
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/usr/share/doc/libfreetype6/reference/ft2-incremental.html
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/usr/share/doc/libfreetype6/reference/ft2-multiple_masters.html
/usr/share/doc/libfreetype6/reference/ft2-ot_validation.html
/usr/share/doc/libfreetype6/reference/ft2-outline_processing.html
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/usr/share/doc/libfreetype6/reference/ft2-sfnt_names.html
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/usr/share/doc/libfreetype6/reference/ft2-system_interface.html
/usr/share/doc/libfreetype6/reference/ft2-toc.html
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/usr/share/doc/libfreetype6/reference/ft2-truetype_tables.html
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