"Oh! you shall have that another time," I replied, in a mischievously significant tone of voice, and shut the door hastily in his face.

As Hausheer departed, I heard him utter a perfect volley of oaths and imprecations, amidst which, the words, "I have been a great blockhead," were distinctly audible.

These volleys of abuse mattered little to me; I was in my own house, and had nothing to fear. I left the rascally juggler to his anger and his regrets.

Some months afterwards, I was one day reading the "Gazette des Tribunaux," when my eye was arrested by the name of Elias Hausheer, figuring amongst a gang of sharpers of the worst kind.

The phrase, "I have been a great blockhead," recurred to my mind. I could now understand its true meaning. Hausheer was not a man to stick at trifles: he was a blockhead for not having possessed himself of my snuff-box at any price.

The recollection of it made me shudder.

The knowledge of the danger I had incurred made me more prudent for the future, but did not prevent me from following my researches, only, instead of going myself on such occasions, I now always sent a third party. I employed, as my agent, a young man whom I knew to be respectable enough, though much of his time was passed in "estaminets" and gaming-houses, and I paid handsomely for each new trick that he brought me.

At such a statement I fancy I hear my reader exclaim: "Why pay so much for learning a thing which is wrong? Is it not the act of a fool or a monomaniac?"

I acknowledge my weakness; but, dear reader, had it not been for this monomania, I should never have had the success I have enjoyed.

I always intended turning my knowledge to a good account; many circumstances have retarded the fulfilment of my intentions; but at length I have the honour of presenting the result of my labours to you, under the title of,—