Abstract John Yeon (1910-1994) worked for the firm of A.E. Doyle & Associates and is credited, along with Pietro Belluschi, with the development of the Northwest Regional style of architecture. Yeon was also a dedicated conservationist who donated land to the state parks system. Collection includes a statement, 1980, regarding the proposed Cadillac Fairview project in Portland; a letter to Oregon Governor Vic Atiyeh, 1979, regarding protection of the Columbia Gorge; and reports and letters, 1979,...