The ArchiTech drawing here (as is the perspective in this show) is dated by Wright as June 8, 1922. However, Wright is known to have returned from his Japanese projects in August 1922 causing this date to be incorrect.
Called Fir Tree at this time, it has been known as the Shore Type Cabin to historians of the Lake Tahoe Summer Colony.
Though the tree shapes resemble those in the Doheny Ranch project drawings, its obvious this rendering was drawn by someone other than Wright. But he alone initialed this presentation drawing in his red square chop.
When the Summer Colony sales team vacated its office, they left the furniture, file drawers, and a few of Wrights drawings to the next tenant, Chester Barrigan, who left them to his daughter, who willed them to her son.
Recently, the aging tissues were conserved by proper museum techniques leaving the Tahoe cabin drawings nearly pristine within tightly enclosed framing.