Clark, George R. George Rogers Clark memorial, hearing, 69th Congress, 2d session, on S. J. Res. 139 and H. J. Res. 307, joint resolution providing for participation of United States in celebration in 1929 of 150th anniversary of conquest of Northwest Territory by George Rogers Clark, authorizing appropriation for construction of permanent memorial in Vincennes, Ind., and for other purposes, Jan. 18, 1927.