These illustrations come from an 1870 edition of Favorite Fables in Prose and Verse (online at the International Children's Digital Library). The illustrations are based on earlier drawings by Harrison Weir. Click here for more illustration slideshows. You can see Harrison Weir's own illustrations in another slideshow.
Here is the Weir Favorites slideshow (apologies to iPad users - the Flickr.com slideshows are Flash-based, but you can view the Flickr album directly if the slideshow does not work):