Holmes unfolded the note carefully and spread it on his knee He took a magnifying glass out of his pocket and examined the paper
This paper was made in India; he remarked. Have a look at it, Watson
I took the note and studied it carefully. The paper was thin and old.
It looks like the plan of a large building; I said But what are these names at the bottom?
And what is the meaning of-"the Sign of Four?