four o’clock
He apparently knows the unwritten law of the Yukon that travellers take turns in breaking the trail . '' A fresh fall of snow had buried the Dawson route , and , unlucky as usual , Britton had found it his task to pack the loose stuff all the way from the Big Salmon . The other dog-train that had mushed behind him since morning had not offered to do its duty till now . The four o'clock gray was showing in the sky . Night lurked in the river shadows . Britton breathed his dogs a little longer and waited . The sled behind was drawn by a five-dog team like his own , but the huskies appeared far fresher .