Letter from [Arthur] Keith, Royal College of Surgeons of England, Lincoln's Inn Fields, London, to William Bate Hardy, Secretary of the Royal Society Dicusses when to hold a meeting [of the Mackie Ethnological Expedition Committee], and notes that it is essential to have [John] Roscoe [leader of the expedition] present, and that he, [David] Prain [Treasurer of the Royal Society], William Bate Hardy, and himself [Arthur Keith] could discuss the matter. 6 July 1922