The first volume of Robert Ridgway's (1850-1929) great work, The Birds of North and Middle America appeared in 1901 as Part I of United States National Museum Bulletin 50. Part VIII, the last volume to appear during Ridgway's lifetime was published in 1919. After Ridgway's death, his colleague in the Division of Birds, United States National Museum, Charles Wallace Richmond (1868 1932), gathered all of the notes that he had left behind and filed them for future use. Herbert Friedmann (1900 ?) was appointed Curator of the Division of Birds in 1929, and in 1933 he began working with Ridgway's notes in an effort to complete the project. Part IX of The Birds of North and Middle America was finally published in 1941, Part X in 1946, and Part XI in 1950, After about 1950 Friedmann stopped working on the project, and devoted his time to his own research.
Smithsonian Institution Archives, Record Unit 7133, Smithsonian Institution, United States National Museum Bulletin 50 Collection
Smithsonian Institution Archives
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