A collection of wonderful illustrations of Don Quixote (click on the image) at A Journey Round My Skull, which, despite its oddly anatomical name, is a lovely lit blog. At the bottom of the post, there are links to depictions by even more illustrators. This is a trove.
Illustrations by Jean de Bosschère for The History of Don Quixote of De La Mancha (1922)
via A Journey Round My Skull: Settle the basin you bear on your head somewhat righter.
These are terrific! What could be sadder than a teetering Don on an emaciated Rocinante? Exquisite.