On Tuesday, the 19th of January 2016, we won a set of seven lots bearing the numbers 40,139, 160, 198, 529, 555, 574, at the auction “History & Game” organized by the Millon & Associates auction house in Paris. The antiquarian printed matter on which we decided to bid, all relate to the theme of games of chance and gambling. Each lot- one of which has been replaced by a copy of our own making - has then been sealed under a black opaque plastic wrap, before being put back into play. The price of each work is calculated from the hammer price of the lot it contains. Cut out from the auction’s catalogue, the description of the hidden lot is only revealed to its buyer in a certificate delivered to him against payment.