LAKE WASHINGTON, a large body of water lying east of Seattle, King County. Isaac N. Ebey visited the lake in the spring of 1851 and named it "Lake Geneva," after the beautiful lake of Switzerland. (Victor J. Farrar, The Ebey Diary, Washington Historical Quarterly, Volume VII., pages 240-241.) That name did not endure. The railroad surveys under Governor Isaac I. Stevens, beginning in 1853, produced a map showing "Lake Dwamish." In the lower left hand corner of the same map is a supplementary sketch by A. W. Tinkham of a route through Snoqualmie Pass to Seattle. It is dated January, 1854, and the lake is shown as "Atsar-kal- Lake." (Pacific Railroad Reports, Volume XI., Part II., Chart No. 3.) Those two names gave an honor for the Duwamish tribe and also sought to record the Indian name for the lake. In that same year, 1854, the pioneers of Seattle held a picnic, at which Thomas Mercer suggested that the large lake be given the name of Washington, after the father of his country, and the smaller one Union because by it the waters of the large lake would one day be united with those of Puget Sound. One year before (March 2, 1853.) Congress had established and named Washington Territory. The suggested name for the lake was approved at the picnic but the pioneers published no map. Preston's Map of Oregon and Washington West of the Cascade Mountains, dated 1856, shows "Dwamish Lake." The same name appears on the Map by the Surveyor General of Washington Territory, dated 1857. (United States Public Documents, Serial No. 877.) in 1858, George Davidson, of the United States Coast Survey, in his Directory for the Pacific Coast of the United States, mentions Lake Washington. (United States Public Documents, Serial No. 1005, page 446.) After that the name soon found its way on all maps and charts. Another Duwamish Indian name, "It-how-chug," said to mean "large lake," was published in 1895. (J. A. Costello, The Siwash.)