Again, much of the best content seems to be in printed works rather than online items.  Fortunately, this Massachusetts Review article from 1966 is made available through JStor.  There are only six copies in print available through WorldCat.

The Citation:

Manet Caricatures: Olympia
Mina Curtiss
The Massachusetts Review, Vol. 7, No. 4 (Autumn, 1966), pp. 725-752
Published by: The Massachusetts Review, Inc.
Stable URL:

This is a very important work in documenting some of the primary caricatures made of Manet’s Olympia from that time period.  Interestingly, Curtiss notes the popularity of illustrating the black cat found in Olympia painting, sometimes used more often than Olympia herself…