The Bolster series contains 5 of 17 etchings known as The Posthumous Prints. After Gorey's death, a series of previously unpublished etchings were discovered. Gotham Book Mart chose 3 of them to reproduce them in runs between 50 and 150 numbered copies in 2003. Afterwards, the Edward Gorey House took over the publication and sale of the remaining images. The prints are catalogued by the Gorey House as numbers 201-214; the Bolster prints are numbers 204-208. They were each produced in a series of 99 numbered sets and 26 lettered sets (except #212 which had no lettered set).
