frequently giving out a metallic ring as it struck the flinty ice. Now
and then, too, a resounding creak sped past, and might have alarmed
them had they not understood its nature. It indicated no weakness of
the frozen surface, but was caused by the settling of the crystal
floor as the water flowed beneath.

For a few minutes these were the only noises that broke the impressive
stillness. The three had begun to hope that the ominous sounds would
be heard no more, and that the wolves were too far from the river to
discover them until beyond reach.

If they could once place themselves below the animals they need not
fear, for they could readily distance them. Should the speed of the
pursuers become dangerous, a sharp turn or change in the course would
throw them off and give the fugitives an advantage that would last for
a long time. But they dreaded the appearance of a whole pack of the
brutes in front, thus shutting off their line of flight homeward.
True, in that case they could turn about and flee up stream, but the
risk of encountering others attracted by the cries would be great, and
perhaps leave their only recourse to a flight into the woods.

The thoughts of each turned to the nearest hunter's cabin, although it
was several miles distant, and probably beyond reach.

It was strange that, having emitted so many signals, the wolves should
become suddenly quiescent.

No one spoke, but as they glided swiftly forward they peered along the
gleaming surface in search of that which they dreaded to see.