Sure enough, when we reached Baker Street the detective was already there. We found him pacing up and down, full of impatience. He looked very important, so we could see that he had enjoyed a successful day's work. 'Well?' he asked. 'What luck, Mr. Holmes?'

'We have had a very busy day, and have managed to do some things,' my friend explained. 'We have seen both the retailers and also the wholesale manufacturers. I know where all the busts came from and where they went.'

'The busts!' cried Lestrade. 'Well, well, you do things in your own way, Mr. Sherlock Holmes, and I am not going to complain about it. But I think I have done a better day's work than you. I know who the dead man is, and I have found a cause for the crime.'

'We have an inspector who takes a special interest in Saffron Hill and the Italian quarter. Well, this dead man was a Catholic. That, along with his dark-coloured face, made me think he was from the South. Inspector Hill knew him as soon as he saw him. His name is Pietro Venucci, from Naples, and he is one of the nastiest killers in London. He is connected with the Mafia. As you know, the Mafia is a secret criminal society, and those who do not obey its orders are murdered Now, you see how everything starts to become clear. The other fellow is probably an Italian also, and a member of the Mafia.'