A Puget Sound passage between southeast Whidbey Island and the adjacent mainland in Snohomish County is named Possession Sound. It was named on June 4, 1792 by Capt. George Vancouver which was the birthday of King George III. On that occasion, Vancouver took formal possession of New Albion, renaming it New Georgia in the king’s honor. In 1841, Cmdr. Charles Wilkes copied Vancouver’s name.