Rackham's Fairies, Elves and Goblins: More than 80 Full-Color Illustrations
A delightful collection of wonders. They are not all from British folklore, though many are. Several, for instance, are from Comus or Greek legends. But they all have his charm.
Goble's Fairy Tale Illustrations: 86 Full-Color Plates
Not a complete collection, but covering a lot of his illustrations. Including not only a collection of popular European folk tales (many of which are not commonly known), but also The Water Babies, a collection of Indian fairy tales, a collection of Japanese fairy tales, the Pentamerone of Italian literary tales, and a book of fairy poetry.
Some lovely stuff here.
Great Illustrations by N. C. Wyeth
A varied collection of his works, from a variety of works. The main areas are the Wild West, early America, and medieval. The medieval is probably the least historical, but all, of course, being illustrations of romantic adventure, do not draw too near to history, even when about the American Civil War.
Lots of dramatic works here.