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Letter, Wilbur F. Smith to Robert Porter Allen, March11, 1939
Wilbur F. Smith
A typed letter from Wilbur F. Smith to Robert Porter Allen dated March 11, 1939.
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Letter, Jay A. Weber to Robert Porter Allen, March 6, 1939
Jay A. Weber
Handwritten letter from Jay A. Weber to Robert Porter Allen regarding the Roseate Spoonbill Questionnaire dated March 6, 1939.
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Questionnaire, Roseate Spoonbill Nesting, Francis M. Weston, March 8, 1939
Francis M. Weston
A returned Roseate Spoonbill Nesting questionnaire from Francis M. Weston.
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Letter, Horace A. Wolverton to Robert Porter Allen, April 22, 1939
Horace A. Wolverton
A typed letter from Horace A. Wolverton to Robert Porter Allen dated April 22, 1939.
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Letter, C.C. Youmans to Robert Porter Allen, March 10, 1939
C. C. Youmans
A handwritten letter from C.C. Youmans to Robert Porter Allen dated March 10, 1939.
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Chart, Illustrating Darling's Theory of a Social Threshold, circa 1930s to 1950s
Robert Porter Allen
A chart illustrating Darling's theory of a social threshold in birds.
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Chart, Welfare Factors For Spoonbill Breeding Area, circa 1930s-1940s
Robert Porter Allen
An illustrated chart for the welfare factors for spoonbill breeding.
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Field Notes, Nest Relief in Grus Americana
Robert Porter Allen
A chart of nest reliefs in whooping cranes.
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Letter, Robert Porter Allen to Aransas National Wildlife Refuge, Whooping Crane Investigations, circa 1930s-1950s
Robert Porter Allen
A letter from Robert Porter Allen to the Arkansas National Wildlife Refuge about an upcoming whooping crane investigation.
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Lines Written in a Hide, circa 1930s-1950s
Robert Porter Allen
An original poem by Robert Porter Allen created as he was inside a camera hide.
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Sign, The Cowpens Bird Sanctuary, circa 1930s to 1950s
Robert Porter Allen
A sign reading "The Cowpens, a bird sanctuary no hunting - no landing Florida park service protected by National Audubon Society."
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International Stamps Featuring Birds, circa 1920s-1950s
Robert Porter Allen
A collection of stamps from Uruguay, Austria, and Armenia, featuring birds.
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Daily Notes, Dry Tortugas, Florida, 1903
M. R. Burton
Daily notes on the observations made by M.R. Burton for the American Ornithological Society.
