someone scanned a LOT of old illustrated books and shared them on Flikr

https://www.flickr.com/photos/taffeta/albums/72157673743734512/with/30222912566 for these illustrations or https://www.flickr.com/photos/taffeta/albums/with/72157712122476192 for a LOT of albums of similar cool stuff

See this page for some far out stuff https://www.flickr.com/photos/taffeta/albums/72157637359001185/with/10698679783