On this day, the sun which had risen at twenty minutes to six, set at forty minutes past five, having traced its diurnal arc for eleven hours above the horizon. The twilight would struggle with the night for another two hours. Then it would be intensely dark, for the sky was cloudy, and there would be no moon. This gloom would favor the plans of Ivan Ogareff.

For a few days already a sharp frost had given warning of the approaching rigor of the Siberian winter, and this evening it was especially severe. The Russians posted by the bank of the Angara, obliged to conceal their position, lighted no fires. They suffered cruelly from the low temperature. A few feet below them, the ice in large masses drifted down the current. All day these masses had been seen passing rapidly between the two banks.

This had been considered by the Grand Duke and his officers as fortunate. Should the channel of the Angara continue to be thus obstructed, the passage must be impracticable. The Tartars could use neither rafts nor boats. As to their crossing the river on the ice, that was not possible. The newly-frozen plain could not bear the weight of an assaulting column.