TLS signed “R. E. Byrd,” one page, 8.5 x 11, March 1, 1927. Letter to fellow polar explorer Adolphus Greely. In part; “I am very sorry indeed to tell you that I did not get my data from the variation of the Magnetic Compass sufficiently accurate to publish it in a scientific paper. I have not got my figures with me. When I return to my Headquarters at Boston I will look things up and let you hear from me.” Intersecting folds, one through a single letter of signature, several spots and strips of toning, otherwise fine condition. RRAuction COA.