Library of Congress Manuscript Division for Chanute, O. Papers, 1807-1912 (Baden-Powell, Baden Fletcher Smyth; correspondent of engineer and pioneer aviator Octave Chanute)
LC manual files, Oct. 10, 1997 (heading Baden-Powell, Baden Fletcher Smyth, 1860-; author of wks. on ballooning)
NYT obit. index (Baden-Powell, Baden F. S., Maj.; d. Oct. 5, 1937)