 As a token of thanks, Leffingwell named the island Narwhal after the name of Leavitt's steam-driven whaler.Leffingwell named another island – off Alaska's North Slope – Leavitt Island, after his friend the captain.Following the destruction of his own ship, and unable to continue his work with the meager supplies left and Native assistance, Leffingwell wrote that "the writer returned to civilization in the fall of 1908 as guest of Capt.