The life of Scottish watercolourist William Alister Macdonald (1861-1956) contained more mystery and intrigue than a novel by the authors he knew as friends. Mid-life in the early 1900s he painted widely across Britain, Europe and North Africa. Aged sixty, abandoning his wife and son in London, he settled in Tahiti, where he befriended authors Charles Nordhoff, James Norman Hall and Zane Grey. Critical acclaim of his work peaked in 1935 with the discovery...