One of us must go on alone!" The sharp commands of the two adventurers and the cracking of Mukoki's whip brought the tired and bleeding animals to their feet.

Over the pads of three of the largest and strongest were drawn the buckskin moccasins, and to these three, hitched to Wabigoon's sledge, were added six others that appeared to have a little endurance still left in them.

A few moments later the long line of dogs was speeding swiftly over the trail of the Hudson Bay mail, and beside the sled ran Wabigoon.
Thus this thrilling pursuit of the dog mail had continued since early dawn.

For never more than a minute or two at a time had there been a rest.

Over mountain and lake, through dense forest and across barren plain man and dog had sped without food or drink, snatching up mouthfuls of snow here and there--always their eyes upon the fresh trail of the flying mail.