While they knew that Cassidy had been summoned to Stirling's car, they were unaware that there were other spectators of the little drama.

Two young women had, however, just emerged from among the towering firs that hemmed in the muskeg.

One was attired elaborately in light garments and a big hat that appeared very much out of place in that aisle of tremendous forest, but there was a difference between her and her companion.

The latter knew the bush, and was dressed simply in a close-fitting robe of gray.

She held herself well, and there was something that suggested quiet imperiousness in her attitude and expression.