“And who set him on to it?”

“S’elp me. I don’t know, Masser Holmes. He just say, ‘Steve, you go see Mr. Holmes, and tell him his life ain’t safe if he go down Harrow way.’ That’s the whole truth.” Without waiting for any further questioning, our visitor bolted out of the room almost as precipitately as he had entered. Holmes knocked out the ashes of his pipe with a quiet chuckle.

“I am glad you were not forced to break his woolly head, Watson. I observed your manoeuvres with the poker. But he is really rather a harmless fellow, a great muscular, foolish, blustering baby, and easily cowed, as you have seen. He is one of the Spencer John gang and has taken part in some dirty work of late which I may clear up when I have time. His immediate principal, Barney, is a more astute person. They specialize in assaults, intimidation, and the like. What I want to know is, who is at the back of them on this particular occasion?”

“But why do they want to intimidate you?”