Source: Rockford Morning Star, Feb. 2, 1919, by Paul B. Riis
9th Engineers Mounted
James Carleton Van Duzer, 1888-1918, bird watcher and photographer
Source: Birds of the Mississippi Watershed, by Paul B. Riis.
A Digital Collection of Rockford, Illinois History
Source: Rockford Morning Star, Feb. 2, 1919, by Paul B. Riis
Source: Birds of the Mississippi Watershed, by Paul B. Riis.
