J.G.Hall 1953 Aug 25 Sage Hen Creek, 3 mi. NW Hobart Mills, Nevada Co., Calif. L.colony Ponds behind these dams don't even appear to be silted in yet. A lodge is being started beside a deadfall on the S side of the large pond just down from the shack. A good one to watch & photograph periodically. Material now only 1' high and not over lowest part of deadfall (which is a sort of split trunk affair): Well worn & wet trail leading up to the house from water indicates much recent work. Some beaver work found perhaps ¼ mile above shack, this is a tremendous extension since last summer. Left at 3:30, wind still strong Aug 26 but no clouds. Upper Colony 9AM. Windy, U.colony still from SW. Many cirro-cumulus moving. 2 chickarees chasing each other in Wyettia Wright or Traills' flycatcher perched on lead limb a couple feet above my head. Asp. reprodn at good from flash tree vicinity from stream at least 50' upslope. This doesn't jibe c T.I. Storer's notion that the beaver are halting or depressing asp. reprodn. As a matter of fact any "clearing" operation should favor aspen invasion or maintenance. Main dam just covered & new logs & mud. First downstream