Charles Robert Leslie, "A Lady Contemplating Suicide (Juliet)". All right. So National Trust Collections attributes this to Leslie, and BBC - Your Paintings says it is Gilbert Stuart Newton. It certainly LOOKS almost identical to Leslie's other painting titled "Juliet" . . .
Marie-Gabrielle Capet (French artist, 1761-1818) Self Portrait 1783 The daughter of a servant Marie-Gabrielle Capet, who became a celebrated French portrait painter in oils, watercolors, & miniatures, was born at Lyons in 1761.. When her mentor, Labille-Guiard fell ill, Capet took care of her, until her teacher died in 1803. After the French Revolution, the public exhibitions of the Salons were opened to women; & Marie-Gabrielle Capet exhibited works several times.