Treves (Frederick) Autograph letter signed ('Frederick Treves') to an unknown recipient, thanking him for "the invitation of the Board of the London Institution to deliver a lecture on November 8th" and declining the offer as "I have already made as many engagements as I can well manage", two pages, 8vo, 6 Wimpole Street, Cavendish Square, 14 October 1900; with two other autograph notes signed by Treves (3)