"Yes, there were two of them.They were, as nearly as possible, captured red-handed.We have their foot-marks, we have their description; it's ten to one that we trace them.The first fellow was a bit too active, but the second was caught by the under-gardener and only got away after a struggle.He was a middle-sized, strongly-built man -- square jaw, thick neck, moustache, a mask over his eyes.""That's rather vague," said Sherlock Holmes.
"Why, it might be a description of Watson!""It's true," said the inspector, with much amusement.
"It might be a description of Watson."
"Well, I am afraid I can't help you, Lestrade," said Holmes.
"The fact is that I knew this fellow Milverton, that Iconsidered him one of the most dangerous men in London, and that I think there are certain crimes which the law cannot touch, and which therefore, to some extent, justify private revenge.