Arthur Waite wrote his Key to the Tarot (which was not Pictorial until artwork was added in a later edition) as a companion to the Waite-Smith Tarot, providing theory, history and meanings. He covers various theories of the history of the cards, and gives a quick overview of the images themselves (the specifics of which occasionally seem to diverge from Pamela Smith's actual artwork). His symbolism and interpretations are based substantially upon his readings of Book "T", Etteilla, and possibly Robert Chamber's "Notes on English Cartomancy". Like all of Waite's prose, the book is lumbered with.