/usr/share/blt2.5/demos/bitmaps/ is in blt-demo 2.5.3+dfsg-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/blt2.5/demos/bitmaps/face.xbm
/usr/share/blt2.5/demos/bitmaps/fish/
/usr/share/blt2.5/demos/bitmaps/fish/left.xbm
/usr/share/blt2.5/demos/bitmaps/fish/left1.xbm
/usr/share/blt2.5/demos/bitmaps/fish/left1m.xbm
/usr/share/blt2.5/demos/bitmaps/fish/leftm.xbm
/usr/share/blt2.5/demos/bitmaps/fish/mid.xbm
/usr/share/blt2.5/demos/bitmaps/fish/midm.xbm
/usr/share/blt2.5/demos/bitmaps/fish/right.xbm
/usr/share/blt2.5/demos/bitmaps/fish/right1.xbm
/usr/share/blt2.5/demos/bitmaps/fish/right1m.xbm
/usr/share/blt2.5/demos/bitmaps/fish/rightm.xbm
/usr/share/blt2.5/demos/bitmaps/greenback.xbm
/usr/share/blt2.5/demos/bitmaps/hand/
/usr/share/blt2.5/demos/bitmaps/hand/hand01.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand01m.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand02.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand02m.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand03.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand03m.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand04.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand04m.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand05.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand05m.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand06.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand06m.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand07.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand07m.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand08.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand08m.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand09.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand09m.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand10.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand10m.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand11.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand11m.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand12.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand12m.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand13.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand13m.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand14.xbm
/usr/share/blt2.5/demos/bitmaps/hand/hand14m.xbm
/usr/share/blt2.5/demos/bitmaps/hobbes.xbm
/usr/share/blt2.5/demos/bitmaps/hobbes_mask.xbm
/usr/share/blt2.5/demos/bitmaps/sharky.xbm
/usr/share/blt2.5/demos/bitmaps/xbob.xbm