leaves - like killing the goose. Breeze line on this plant has been going up about an inch per day and is now more than 1 foot high was surprised to see mice several times up in a big thistle cutting green leaves. Also saw a snake growing the "trunk" of a blooming mustard plant. Saw one brief microtus chase, silent. The mice move more softly, more steadily, more "purposefully" than the snake. Most activity is about 8:15, which is after sunset but before bat-flying time. Kneba reports on his census of his Tilden control area: "Last week caught 315 microtus on the 1 +/- acre, up considerably from 2 wks. before. Rat 450/acre +/- 10%." Breeding now 90% stopped on control" i.e. more mice than ever before!" July 22 Watched mice in pasture with Bill Hamilton at 8 p.m. He saw a snake chase off a mouse (possibly Rathus, but almost surely microtus). July 23 Picked up seats in Tilden. No cats seen. No bulldozing yet. Heard loud, insistent squeaking near a log and saw a large garter snake carrying off a 10-grain, squeaking microtus. July 25 Picked up seats in Tilden. Saw one of each, 1 garter snake, occasional deriforme, two cats. Aug. 5 Watched mice from tower in pasture at 8 p.m. Still lots of snake and a few mice seen. Big thistle all dry (or stripped) now. Mice are barking lustily at tongue. Heard no fighting. Two young born owls squealing and