30 August White Cloud campground, 11 miles east of Nevada City, Nevada Co., Calif. ~4300 ft. On the way up to the campground I got a collecting permit from Mr. Boll in Sacramento, then mailed a postcard from Nevada City to Larry Parkison, notifying him of my intention to live-trap squirrels near White Cloud campground. I then set out 10 traps within 50 m. of the clearing along the power line which runs along the south side of the campground. I also set out 9 stakes of the grid at 25 m. intervals in an E-W direction. - Wind was 5-15 mph.; sky mostly clear; temp. in the low 70's (°F). 31 August White Cloud campground, 11 miles east of Nevada City, Nevada Co., Calif. ~4300 ft. From 0730 until about 1100 I checked the traps and put in 12 more stakes The corner stake is at the junction of the power line clearing and a road which goes off to the south about mid-way in the length of the campground. Starting there, a row goes west, lettered A1, B1, C1, etc. Running south from stake A1 will be another row lettered A2, A3, A4 etc. In this way, anysocial interaction, nest site location, cache site, etc. can be recorded with respect to the nearest or most visible stake. The action or location will be recorded along with the distance and azimuth from a stake. From 1100 to 1200 I looked for and at squirrels. Then I went into Nevada City and got 1 lb. of dry ice from the Bret Harte dairy.