La Loge des Boche
Wood engraving after Pierre-Auguste Renoir, 1878
Marc at Free Literature found this article at Open Culture:
The Maligned Impressionist Painter Pierre-Auguste Renoir Illustrates Emile Zola’s Gritty Novel L’Assommoir (1878)
Gervaise et Coupeau, l’ouvrier zingueur, mangeaient ensemble une prune à l’Assommoir
Wood engraving after Frédéric Regamey, 1878
One of the links in the article referenced above mentions there were a total of sixty-two illustrations. Only four were by Renoir. The others are from several different artists and a few are shown at Adventures in the Print Trade.