Hendrick, Burton Jesse (1870-1949). American magazine writer, editor, and biographer. Hendrick graduated from Yale in 1895 and worked as a newspaper journalist until 1905, when he became a staff writer at McClure’s Magazine. Cather blamed him for errors in the first serialized installment in McClure’s of a biographical exposé of Mary Baker Eddy, the founder of Christian Science. In 1913 Hendrick became associate editor of the World’s Work, a public affairs magazine founded by Walter Hines Page. Having won the Pulitzer Prize in biography as co-author of Victory at Sea (1921) and author of The Life and Letters of Walter Hines Page (1922), he left the magazine in 1927 to pursue writing biographies and histories, winning a third Pulitzer for a follow-up Page biography. Doubleday, Page, and Company, of which Walter Page was a partner, published all of Hendrick’s books.

Knopf, Alfred A. (1892-1984). President of New York publisher Alfred A. Knopf, Inc. Knopf received his BA from Columbia University in New York City in 1912 and founded Alfred Knopf, Inc., in 1915 with his future wife Blanche Wolf. They married in 1916, and their son Alfred “Pat” Knopf was born in 1918. Cather chose him as her publisher beginning with Youth and the Bright Medusa (1920) and One of Ours (1922), partly because she was dissatisfied with the promotion of her books by Houghton Mifflin but also because she recognized the high quality of Knopf's books, as well as what she regarded as his intelligent advertising. Knopf was noted for publishing the work of leading European and South American writers in translation, as well as original works. Knopf and Cather’s extensive correspondence testifies to their mutual professional respect and to what also became an important personal friendship.