the
hour of six
You 'll blow the factory whistle when it 's time to get up , wo n't you ? '' `` No , '' teased Elizabeth , coming in just then , `` I 'll drop a couple o ' nice smooth pebbles into camp as a gentle reminder . '' It was a jolly party that crowded into the two boats and sang and shouted their way across Plum Run some ten minutes later , but within the half-hour the night was still , for tired muscles could not long resist the call of sleep . But bright and early next morning they were all astir long before the hour of six and the promised pebbles . A swim in Plum Bun put them in good trim for a hearty breakfast , and that in turn put them in shape for a hard day 's work . And a hard day it turned out to be , for Mr. Fulton parceled out the work and kept everyone on the jump . Jerry and Tod were put at the motor , which had refused to respond to its owner 's coaxing .