two inches...

The jerks perceptibly diminished; as the sled gained momentum, he caught them up, till it was moving steadily along.
Men gasped and began to breathe again, unaware that for a moment they had ceased to breathe.

Thornton was running behind, encouraging Buck with short, cheery words.

The distance had been measured off, and as he neared the pile of firewood which marked the end of the hundred yards, a cheer began to grow and grow, which burst into a roar as he passed the firewood and halted at command.

Every man was tearing himself loose, even Matthewson.