Félix ZIEM (1821-1911). L.A.S., December 9, 1868, [to Paul de Saint-Victor]; 1page in-8 "I have decided to submit directly to the public a series of watercolors of Venice Constantinople etc., which will be sold at the Hôtel Drouot on Monday December 21 (Private Exhibition on Saturday December 19), since you have been kind enough to take an interest in my work, I dare to ask you to give me a little helping hand in this unique circumstance"...