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John Carter - timeline
Confederate Army Cavalry officer John Carter searches for gold and flees from the 7th cavalry and Apache Indians. He finds a cave of gold where he sees a Thern and activates a medallion that takes him to the planet Barsoom, known to him as Mars. (Fort Grant Outpost, Arizona)
Edgar Rice Burroughs hears that his uncle John Carter has died and inherits his estate, where he reads the manuscript of his adventure on Barsoom. A Thern follows him but is killed by John Carter, who gets back the medallion and returns to Barsoom.
According to John Carter's will, his nephew Edgar Rice Burroughs owns his estate until this year. (Richmond, Virginia)