8 to 12 o'clock
The trail had become more fresh with every mile traversed . `` He 's gone into some cave to hold off as long as possible , '' was the opinion of Captain Marshall . Nort and Dick had adjoining posts . They had been selected for the first four hours of duty , from 8 to 12 o'clock , and it was near that last hour when Nort , coming back from having reached the end of his beat , called softly to his brother . `` Did you hear anything ? '' asked Nort . `` What do you mean ? ''