Leda and the Swan 

Almost certain French etching (eau forte, 10 x 14 cm.)  Unsigned, it was possibly used as (bibliophile) book illustration: it was found in a larger collection of French art containing etchings, drawings etc.. In the same collection similar prints from rare books were found by Berthe Morisot, Demetrios Galanis and Renoir also from rare French book editions. 

See: Berthe Morisot.