As the next issue (Sep) of our hobby's Magazine (AP) goes to Press, I am reminded of a couple of interesting topics.
There will be extensive coverage of the first tinfoil phonographs of which a small number survive, i.e. those finely-finished "E. Hardy" models made and sold in 1878-1880 (ca $40), and based on Edison's own (documented) design of Jan 8, 1878. Since we always like a good mystery, we decided to verify what the "E." stood for - and various sources, including the Internet, mainly claim that it was an abbreviation for "Edme." It's a nice enough French first-name (or capital letter), but I cannot find it in any period magazine, book, patent, or advertisement before 1986 - every such reference (to what E. stood for) is from after that date! Who was he? Is it true that he also made some of TAE's Electric Pens? The original machines (where the solid grooved mandrel acts as the flywheel) kept their secret well -- the brass plate on the base (each with its own unique serial no.), have "E. Hardy" too.
Has anyone come across this puzzle before? Well, now may be a good time to renew your subscription to AP, each Quarterly issue in full color (published for many years), and generally containing 60 pages of great features, information, and ads. It's also a practical way to show your support for our Hobby, and to spread the word.
Related to this is the matter of one of the first books ever published on the discovery/invention of the (tinfoil) Phonograph, a handsome (hard-to-find) French account of 130 pages, dated 1878 (by Pierre Giffard). There's a good mystery here too -- every example, of the few that have survived, is clearly identified as the "Eighth Edition." So where are the others? Are there any known '1st - 7th' editions out there?

Or was this an over-optimistic author-publisher who wanted to suggest that his book was selling like hot-cakes?

Allen