two o'clock
`` Oh , how much do you want ? Only make haste -- I 've enough to pay you , but every moment is precious , '' said Mary . `` Ay , that it is . Less than an hour wo n't take us to the mouth of the river , and she 'll be off by two o'clock ! '' Poor Mary 's ideas of `` plenty of money , '' however , were different to those entertained by the boatmen . Only fourteen or fifteen shillings remained out of the sovereign Margaret had lent her , and the boatmen , imagining `` plenty '' to mean no less than several pounds , insisted upon receiving a sovereign -LRB- an exorbitant fare , by the bye , although reduced from their first demand of thirty shillings -RRB- . While Charley , with a boy 's impatience of delay , and disregard of money , kept urging , `` Give it 'em , Mary ; they 'll none of them take you for less .