In Henry Holiday's illustrations to Lewis Carroll's The Hunting of the Snark I found that Holiday constructed his illustrations as pictorial puzzles by quoting elements from paintings and illustrations of earlier artists (three images on the right side of the comparison image shown above). Holiday assimilated these elements into his Snark illustrations. But I also found that Alfred Parsons may have quoted elements from one of Holiday's illustrations.

For more, click on the images in the comment below.