Diana of Poitiers, the mistress of Henri II. of France (_cir._ 1540), was another famous collector, who spent vast sums on binding her books. The designs were made in all probability by Le Petit Bernard, one of the most famous engravers of his day, and her books, like those of Grolier, were gold tooled on both back and sides. Diana's device consisted of a bow and a crescent, sometimes with a sheaf of arrows. Those books which the infatuated Henri sent to his mistress bear the H. surmounted by a crown and flanked by the _fleur-de-lys_. Henri was himself a collector of no mean order, and his volumes, like those belonging to the fair Diana, have their countless worshippers. The king, whatever the laxity of his morals, was a stickler for etiquette, and drew a wide distinction between a mistress and a wife. Some of his books are stamped with the interwoven initials H. and D., and ornamented with the usual emblems of the chase, but no crown is observable. That makes its appearance over a solitary H., banished, so to speak, to the remoter regions of the cover. Sometimes the initials are changed to H. C., interwoven and surmounted by the crown, and then we know that Henri chose to honour his wife Catherine de Medicis with notice. Diana's library at the Chateau d'Anet was dispersed by auction in 1723: it contained volumes of the most varied descriptions, lives of the saints and lewd songs jostling one another with impudent familiarity. Catherine de Medicis herself had the taste of Diana for beautiful bindings, and kept a staff of workmen, who vied with each other in the production of beautiful specimens of ornamentation. She had the mania of the true book collector, for on the death of the Marechal de Strozzi, she laid violent hands on his choice and valuable library, promising to pay for it sometime, but ultimately dying herself without doing so. The books of Francis I. (1515-47), if bound for his use while Dauphin of France, are marked with a dolphin, in addition to the ordinary kingly stamps of the Royal Arms, a salamander, and the letter F. The motto in each case is the same: "Nutrio et extinguo". Specimens of binding having the dolphin are extraordinarily rare.