It was here [Alki Point], on the rainy morning of November 13, 1851, that a group of 10 adults and 12 children disembarked from the schooner Exact.
The Denny Party landed at Alki Point November 13, 1851, and platted a settlement of six blocks of eight lots, calling the settlement “New York Alki”.
New York-Alki was the site of the first settlement in Seattle. Here on November 13, 1851 the first settlers arrived. Finding a site up the Sound more attractive most everyone moved to help found the City of Seattle.(Meany, p. 4).
https://github.com/davepinch/pinchy.cc/blob/master/content/sites/historylink.org/File/7045.snippet-6-2-1.md
Seattle’s Early Donation Land Claims (historylink.org) This essay summarizes the original Donation Land Claims submitted in the area of future Seattle.