My subconscious produced 'Tissot and the English school of art' off the top of my head as a suitable subject for Hertha's mother to discuss at an exhibition, and when I got in from my walk I looked him up and was flattered to discover that he was indeed a French painter who was associated with England (to the degree that he chose to call himself 'James Tissot' rather than 'Jacques' ;-p)
Unfortunately he didn't actually return to exhibit in Paris until 1885, which doesn't quite fit with a story I was setting in the early 1880s! I think the reference can stand; she was said to be talking *about* Tissot in reference to the paintings they were currently looking at, rather than suggesting that any of the pictures on the wall were necessarily by him -- and there's no reason in any case why isolated canvases shouldn't have made their way back to Parisian buyers during the years he spent in England. There's certainly no suggestion that this was an exhibition solely of Tissot's work, which is what did eventually take place in 1885.
( various fic progress )