L. 30. P. 7 mm. May 31. Stein came in this pm. S showed me his Papuan & Tsiman [illegible] collections. A young, active man who leaves a good impression. Told me to ahead describe the shrews he took in Tsiman. Attended the Society für Säugetierkunde (monthly meet) in the evening. Three papers were read - all on hybridization. Wed. June 1. Chapin turned up today. Has gained 28 kilos in weight but very fit looking. Sat. June 4. Dr. Schultz-Kempenner who has just returned from his expedition to the Tari River, n. of north J Amazonas. He reports no severans at all there. Leaves Sunday for Congo. Thursday, June 9. At 9 a.m. left Berlin for Leyden. A hot, dusty trip. Reached L. at 10. p.m. Friday June 10. Met Tenge (in charge birds & mammals; Broschme (Director); and L.D. Brongersma (Herpetology; Felides, n). All very pleasant people. We we at work by the afternoon got through several types. Interesting to find that "Mus suber" Tenthk is not a Molomys but a Rattus. Sat. June 11. Had lunch with the Tengos's. On Sunday we went out in the day with the Tengos to the sand dunes at Katwijk. On Monday we were out in the evening with the Brongersma's. He is Herpetologist & also does some work on mammals. Thursday took dinner at the home of Broschme, th director where met Dr. Becking, plant physiologist. Sunday went with Broschme & just of his children to Amsterdam Zoological Gardens. The nations Friday we went to Amsterdam to study the types of Sody's