J.G. Hall 1953 July 13 Smith Neck Creek, Sierra Co., California Mallards in one of the ponds. Clyde says one "colony" could occupy more than one house at the same time or that two separate colonies could be adjacent. I'm not sure. Tagging also seems to me to offer the only answer to finding out just where a given beaver will go. He says the scent mounds are used starting in Oct & lasting on thru Dec. July 14 Sagehen Creek, 3 mi. NW Hobart Mills, Nevada Co., Calif. Upper colony 11:30 AM, clear but breezy. Very little if any aspen cutting on E end of the colony but some alder cutting on S shore of E end. "Photo" tree just W of lodge has been dislodged but, being dead before, was not touched. Further W on N shore I marked "O" on a live asp that has been notched several years ago. Cutting this tree & studying the rings may reveal a date of cutting prior to 1948 (the earliest date yet established at any colony by the noding method). Lodged trees, unless dislodged within a week might as well be counted as no tree.