I wonder if the prequel to Treasure Island is based on the book Porto Bello Gold by this writer
Arthur D. Howden Smith (1887–1945) was an American historian and novelist.
Life
Arthur Douglas Howden Smith was born in New York. He began writing by contributing fiction to the pulp magazines; his main market was Adventure.
For the magazine, Smith wrote sea stories about the adventures of Captain McConaughy,. There were also historical swashbucklers about a Viking, Swain, living in the Medieval Orkneys and engaged in a terrible feud with the witch Frakork and her blood-thirsty grandson Olvir Rosta – which Smith bases on historical information provided by the Orkneyinga saga.
Smith's most famous series were the "Grey Maiden" stories. This revolved around a cursed sword created during the reign of Pharaoh Thutmose III and its subsequent appearances through world history.
Smith also wrote "The Doom Trail" (1921) and its sequel "Beyond the Sunset", the adventures of Harry Ormerod, an 18th century English exile, in the frontier of Colonial North America at the Iroqois country where a fierce struggle is waged with French agents out of Canada for control of the fur trade.
In Porto Bello Gold (1924), a prequel to Treasure Island – written with the permission of Robert Louis Stevenson's executor, Lloyd Osbourne – Harry Ormerod's son Robert goes to sea in the company of such famous pirates as Captain Flint, Long John Silver and Billy Bones and takes part in capturing the treasure which would be recovered in Stevenson's book.
