Had it been broad daylight I might have had a fair chance of shooting it; but in the obscurity, as it scratched away among the fallen timber, from which several gnarled and twisted limbs projected upwards, I was uncertain as to the exact position of its head.  Under the circumstances, I considered that discretion was the better part of valour; and feeling sure that Uncle Donald and Sandy would soon come up and settle the bear more effectually than I should, I began slowly to retreat, hoping to get away unperceived.  I stepped back very cautiously, scarcely more than a foot at a time, then stopped.  As I did so I observed a movement a little distance off beyond the big bear, and presently, as I again retreated, two other bears came up, growling, to the big one, and, to my horror, all three moved towards me.