Jack London’s Dictaphone Recording Cylinders and similar items

Two Jack London Dictaphone Recording Cylinderswith their original cylinder cases Each container measures 6-1/4" by 2-3/4" in very good condition, one with a bit of matter missing on the end as shown, not affecting the recorded part. The original containers have their lids as issued long ago. The question I am asked: Has Jack London's voice been recorded on them? According to Russ Kingman, who was the world authority on the life of Jack London, yes. These cylinders have recordings of Jack London?s voice. Jack London later in his writing career used a dictation machine for dictating his stories, books and for issues pertaining to business on his ranch in Glen Ellen, California. He passed away in his bungalow on his estate in 1916. These two dictation cylinders came from the estate of Jack London decades ago when I was assembling my collection of Jack's first editions, ephemera, letters and other books and related material. Regarding these two dictation cylinders: I obtained these from Russ Kingman back in the 1980's when I would travel to Glen Ellen to talk with Becky London, Russ and Winnie Kingman at the Jack London Bookstore and Research Center. Kingman was regarded as a world authority regarding the life and work of Jack London. Both cylinders have notations on the lids and one has the "J.L" in red crayon and some other notations, probably written by Jack London. These indicate they were used in 1916, the year of London's death. He was the first American superstar celebrity writer in America to earn one million dollars by his pen. As I recall, there were about eight or ten of these dictation cylinders that I saw, and many were broken or had pieces missing. some were missing their case lids. I will provide a letter stating that these are authentic items with a history of where I purchased them with photos of each cylinder. John Anthony Miller Phantom Bookshop Ventura, CA 93003