Thaelder 1958 P.24 Journal Sept. 21 Martiney (saltmarsh), Contra Costa Co., Calif. Two Microtus. Sept. 22. Two more Microtus. I've been discarding most of the Reithros live caught, but put up all the forex. Sept. 23 Two more Microtus. I pulled my traps. Dec. 22 San Pablo Creek (saltmarsh), Richmond, Contra Costa Co., Calif. George Fisher and I left campus about 1: P.M. to get to this locality. George had been there previously to trap. We enquired at the home of the Rante's about permission to enter the marsh behind their house. They told us Stand Oil (ofld) owned the area. After much running around we talked to two men in the Plant Protection of the Richmond Refinery. They assured us we could go into the area. Upon returning to the marsh we walked around for a while. Microtus sign was abundant. Finally I settled on a place to trap and started setting out traps. Soon a local farmer, came up and told us he rented the land from Stand Oil. Finally we talked him into letting us continue our trapping. I got out only 52 traps by dark but already had 6 Microtus. Dec. 23. Checked my traps this A.M. and took one forex onitis.