The following is what I will very likely use (or something very close to it):
That is based on the cover found on a reprint of Drawing-Room Conjuring, which was a translation (from the French) by Professor Hoffmann. The book was first published (in book form) in 1887. (Oh, this is the 130th anniversary year. Cool!) Earlier, it had been serialized in Every Boy’s Magazine.
Here is what the planned back cover and spine (and front cover again) look like. The vertical black lines show the edges of the spine.
September 15, 2017