Now they must go.
The resilience of a youthful and powerful physique offers many a problem to the biologist.

Vital force seems to find some mysterious reservoir of nourishment hidden away in the nerve-centers.

Beverley set out upon that seemingly impossible undertaking with renewed energy.

It could not have been the ounce of parched corn and bit of jerked venison from which he drew so much strength; but on the other hand, could it have been the miniature of Alice, which he felt pressing over his heart once more, that afforded a subtle stimulus to both mind and body?
They flung miles behind them before day-dawn, Long-Hair leading, Beverley pressing close at his heels.

Most of the way led over flat prairies covered with water, and they therefore left no track by which they could be followed.
Late in the forenoon Long-Hair killed a deer at the edge of a wood.
Here they made a fire and cooked a supply which would last them for a day or two, and then on they went again.