ERB’s seventh story was started in 1913, right after finishing “At the Earth’s Core.” It was published that year in THE ALL-STORY magazine for July, August and September (3 parts). The second half of the tale was started in 1914, right after he finished “Thuvia, Maid of Mars,” but wasn’t published until 1917 in ALL-STORY WEEKLY, over 4 weeks starting March 31. Eight years later the hardcover edition was printed by McClurg on March 21, 1925.
The cover painting is by J. Allen St. John, with the same illustration, printed in sepia used inside the book for a frontispiece. The titling was added separately, not painted on as with some of the St. John cover art.
This comparison shows the original dust-jacket, in an unrestored state, on the left, and the original painting, which I have used in my Recoverings restoration. There is some evidence that the painting has had some slight restoration done to it, chiefly around the edges, but it appears that the main figures have not been touched.