This article, written in 1903 in the Proceedings of the American Philological Association, discusses the history of the auxiliary verb in the German language.
This letter from U.S. House Representative G.N. Haugen, acknowledges the receipt of a letter from Keyes who asks him to extend protected status to the American bald eagle.
A.C. Bent, of the Smithsonian Institution, is responding to Keyes' letter about the loss of water fowl in Iowa and telling him about his progress on the book he is writing.
Princeton University President Woodrow Wilson responds to Charles Keyes' letter. Keyes asked if students who earn higher grades earn more points toward graduation.
This is a letter from Arthur Cleveland Bent from the Smithsonian Institution thanking Dr. Keyes for agreeing to contribute to the book Life Histories of North American Birds that Mr. Bent is working on.
This is a letter from Mrs. W.H. Norton to Dr. Keyes, thanking him for his tribute on the life and work of her deceased husband in the Proceedings of the Iowa Academy of Sciences.
This letter was written to Professor Keyes by former student Harry C. Trimble who was congratulating him on the many activities he was involved in. Mr. Trimble wrote this letter after reading about Professor Keyes accomplishments in a recent Cornell…
This letter from Mr. Powers to Mr. Keyes congratulates him for the probable improvement of the Archaeology Department and Museum because of a generous gift of over 4 million dollars to the college. Mr Powers also speaks of the articles and books he…
