six o'clock
A tug hove in sight shortly afterward that caused our gloomy faces to light up with gladness , for it carried a gang of negroes . The tug made fast to the barge , and its living cargo was soon hard at work filling the ship 's bunkers . All that afternoon we `` lingered in the lap of luxury , '' as `` Bill '' put it . At six o'clock our dusky -LRB- doubly dusky -RRB- coal heavers went ashore , their labor over for the day . Though the workmen had left , the work was still to continue . The crew coaled till twelve o'clock , working in quarter watches . The following day another barge came alongside and part of the crew had to turn to and help the hired shovellers .