Autograph Letter Signed, to Bartlett James, asking him to call at the Royal Institution. 2 pp. 7 x 4 inches, in good condition. oyal Institution, 1 January 1868, “I lecture here from 3 to 4 and if you & your two young friends would care to look in at the lecture, the showing of this note to the porter will admit you.” John Tyndall (1820-1893), scientist, mountaineer, author of the classic The Glaciers Of The Alps (1860). His initial scientific fame arose in the 1850s from his study of diamagnetism, which led to his appointment as successor to Michael Faraday at the Royal Institution in 1862.