Guillaume Seignac was a late Victorian painter (he died in 1924) who mostly turned out undistinguished but sometimes amusing imitations of Bouguereau. His draftsmanship could be flabby and his images didn't have the über-photographic authority of his master.
The image above is different, though. It has an odd suggestive power, almost perverse, that's rooted in theatrical gesture. I find it haunting, for reasons I can't quite put my finger on.