Heerwagen, Friedrich Letter from Freidrich Heerwagen to Galton dated 27 December 1888 enclosing a copy of Heerwagen's paper "Statistiche Untersuchungen uber Traume und Schlaf". Heerwagen was interested in Galton's Inquiries into Human Faculty, particularly studies into visualisation. Heerwagen was conducting his own survey into visualisation of the months of the year ("year circles"). Letter from Heerwagen to Galton dated 24th / 2nd January 1889 thanking the latter for sending a copy of his Memoirs and discussing the results of Heerwagen's survey of dreams. Both letters bound in with Heerwagen's paper on dreams and sleep [in German], which has been annotated by Galton. 27 Dec 1888