Sometimes, in the traces, when jerked by a sudden stoppage of the sled, or by straining to start it, he would cry out with pain.

The driver examined him, but could find nothing.

All the drivers became interested in his case.

They talked it over at meal-time, and over their last pipes before going to bed, and one night they held a consultation.
He was brought from his nest to the fire and was pressed and prodded till he cried out many times.

Something was wrong inside, but they could locate no broken bones, could not make it out.
By the time Cassiar Bar was reached, he was so weak that he was falling repeatedly in the traces.