Scope and Contents: Series I. Correspondence, consists of General correspondence, the majority of which is of a professional nature. The fields of paleobotany and paleontology are discussed at greatest length with additional references made to other fields of science. Among the more interesting correspondence is that which deals with expeditions in which Wieland took part. There are at least two references, in letters written to Wieland, to a revolution in Mexico (18 February 1914 and 11 May 1916). These...