Mounted on frame on South wall stacks; 1908 PAW supplement December 9, 1908; photo enlargement, negative. 1911 revision dated December 1911 negative and positive photos. F.L. Olmsted and Co. 1924 revision not published in PAW, 1 photo from glass plate negative; 1925 revision published in PAW January 21, 1925, 2 photos from glass plate negative. Cram. 1966 negative by Douglas Orr.