"It has at some time been pinned to a board.

The diagram upon it appears to be a plan of part of a large building with numerous halls, corridors, and passages.

At one point is a small cross done in red ink, and above it is '3.37 from left,' in faded pencil-writing.

In the left-hand corner is a curious hieroglyphic like four crosses in a line with their arms touching.

Beside it is written, in very rough and coarse characters, 'The sign of the four,--Jonathan Small, Mahomet Singh, Abdullah Khan, Dost Akbar.' No, I confess that I do not see how this bears upon the matter.