The next three days (November 8 to 10) varied from cloudy (with a snow flurry) to sunny; wind moderate to strong, northwest and north; temperature, -10.5° to 1°; 6-8 inches of snow (much drifted); Windy River gradually becoming ice-covered. No Caribou sighted. November 11 was partly sunny; wind moderate to brisk, northerly; temperature, 3° to 6.5°; about 8 inches of snow on the average. Mike Schweder reported five does moving south across the mouth of Windy River on the ice. Thereafter, until my departure on December 4, no more Caribou were actually seen in the vicinity of the headquarters on Windy River. There were, however, tracks of single animals on November 15 and 16. Moreover, during the period from about November 7 to 15, while traveling northward to the upper Kazan River, Charles Schweder saw thousands of Caribou, in herds up to 300, moving southward. He surmised that their course took them somewhere between Ennadai and Nueltin lakes. Fred also reported many to the northward on the 7th, as already noted. This was perhaps the last large migratory movement of the year in our general area. Thereafter virtually all of the animals were presumably in the timbered area to the southward. None was sighted from the plane during the flight to Churchill on December 4. On November 7 the temperature had taken a sharp downward turn, dropping below zero for the first time that season; and it did not again rise above 6.5° till November 12. This cold spell, combined with a snow blizzard from the north on the 6th and 7th, coincided at least in part with the large migratory movement noted above, and it may have been the stimulus for it. The general weather conditions that obtained from November 12 on may be summarized as follows. It was at least predominantly cloudy on all but four or five days. There was snowfall on six days, and drifting snow in the air on several other days. The winds were predominantly north, northwest, and west; less commonly, east and southeast. They were a little more frequently light than moderate or brisk. The extremes of temperature during this period were 22.5° and -23°; the average daily mean, approximately 1°. There was an average of probably at least 8 inches of snow on the ground, with deeper drifts. The river was not wholly frozen over at least up to the end of November. _Retrograde autumnal movement_