5/24. Started out on M-L and T, at 6:30 P.M. Met on the train riding Powers, and later another young rid man, Mr. Donnelly a graduate of the U.of Chicago. Powers is just returned from the war and has th insignia of the Serued Staff Larry cradled with Brookes. Powers and I talked for three hours about things in general in geology and more specifically about the oil conditions. He says no two geologists make iden-tical maps of the same area or impossible it is to be certain of minutiae. Starting to start in somewhere and if it happens not to be the ideal place may come out with a bad result. Then for the guide design this a thickener and what to source th strata diverge. This divergence he thinks is due to original deposition. He tells me that one li 20 feet thick pinched out to nothing in 10 miles. About divergence of formations as a difficulty in locating origin in unproved geology see Sidney Powers with a Bull. U.S.G., nr 686 ad especially in 686 B. Also look into Township R. 24, R. 12 E.