Tuesday Jan. 17-1928. Write letters most of the day. Answers to may sent me by Le Vere. During this week worked mostly on time on Detroit book 'A Geological Comparison of South America with South Africa, 1927'. Wrote first a lengthy review and discussion. Completed it by Saturday Jan 21-1928. Sunday Jan 22-1928 Took up in study Trip cycles by J M. Clint, the New Orleans local authority on the weather by the U.S. Weather Bureau. Completed it on Monday. Tuesday Jan 24-1928 Started on the Paleography of H.A. First wrote the history of these maps, and then took up the Principles of Paleography. Continued on all the rest of the week, up to night of Jan 28-1928.