The Regent's Daughter by Alexandre Dumas

Dubois, on leaving the chevalier, contemplated the chance which had again placed in his hands the future of the regent and of France. In crossing the hall he recognized L'Eveille, and signed to him to follow. It was L'Eveille who had undertaken to get the real La Jonquiere out of the way. Dubois became thoughtful: the easiest part of the affair was done; it now remained to persuade the regent to put himself in a kind of affair which he held in the utmost horrorthe maneuvering of intrigue.

Dubois began by asking where the regent was, and how occupied? The prince was in his studio, finishing an etching commenced by Hubert, the chemist, who, at an adjoining table, was occupied in embalming an ibis, by the Egyptian method, which he professed to have recovered.