In 1842 Karl Richard Lepsius published a translation of a manuscript dated to the Ptolemaic era and coined the name ""Book of The Dead"" ("das Todtenbuch"). He also introduced the spell numbering system which is still in use, identifying 165 different spells. Lepsius promoted the idea of a comparative edition of the "Book of the Dead", drawing on all relevant manuscripts. This project was undertaken by Édouard Naville, starting in 1875 and completed in 1886, producing a three-volume work including a selection of vignettes for every one of the 186 spells he worked with, the more significant variations of the text for every spell, and commentary. In 1867 Samuel Birch of the British Museum published the first extensive English translation. In 1876 he published a photographic copy of the Papyrus of Nebseny.