Question

why did sherlock find out that stapleton was the main culprit ?​

Answer 1

Answer:

Sherlock Holmes initially began to suspect that Stapleton was behind the criminal dealings concerning the Baskerville estate when he closely examined the cryptic warning note received by Sir Henry. While making a close inspection for the water-mark, Holmes held the paper "within a few inches of (his)eyes", and in doing so, became conscious of "a faint smell of the scent known as white jessamine". The scent of perfume indicated the presence of a lady, which turned his attention to the Stapletons, since Beryl Stapleton was one of the few women living in the vicinity on the moor and the only...