Include Grantham's physics notes made as student and teacher, his diplomas and certificates of membership, and a testimonial dinner guestbook and letters received at his retirement (1955); an Aerial Photography School album of photographs of the Second Aviation Instruction Center of the American Expeditionary Force in France, at which Grantham was stationed; letters, one pamphlet, and a newspaper article concerning the collision of H.M.S. Otranto and H.M.S. Kashmir (1918), which Grantham observed from another vessel in the same convoy, and the activities of the National Otranto-Kashmir Association, which was formed by the survivors; family photographs and miscellanea; and related printed matter.