[left]: Segment from an Illustration by Henry Holiday to Lewis Carroll's The Hunting of the Snark (1876).

[right, mirror view]: Segment from The Bone Player (1856) by William Sidney Mount, now displayed in MFA, Boston.



Later Macmillan damaged the puzzle: They removed the white spot.

In a 1910 edition of The Hunting of the Snark, the white spot had disappeared. However, it had a reason, as you see in the inset. The inset shows a segment from a 1876 edition with the white spot and a segment from The Bone Player (1856) by William Sidney Mount with a white spot (reflection from a glass).