He knew that Tayoga had told the truth.

Coming out of his fever it would be a terrible risk for him to become drenched.
"We will make a shelter such as we can in the dip where we built the fire," said Tayoga, "and now you can use your new strength as much as you will in wielding a tomahawk." They cut small saplings with utmost speed and speedily accomplished one of the most difficult tasks of the border, making a rude brush shelter which with the aid of their blankets would protect them from the storm.

By the time they had finished, the little cloud which had been at first a mere signal had grown so prodigiously that it covered the whole heavens, and the day became almost as dark as twilight.

The lightning began to flash in great, blazing strokes, and the thunder was so nearly continuous that the earth kept up an incessant jarring.

Then the rain poured heavily and Robert saw Tayoga's wisdom.