Sentence:  "Harry". To pay, Moll, for I must hike.<br />"Moll". Did you call me, Master?<br />"Harry". Ay, to pay, in a Whiff.<br />"Moll". Let me see. There's a Grunter's Gig, is a Si-Buxom; two Cat's Heads, a Win; a Double <WSD>Gage</WSD> of Rum Slobber, is Thrums; and a Quartern of Max, is three Megs: — That makes a Traveller all but a Meg.<br />"Harry". Here, take your Traveller, and tip the Meg to the Kinchin. 
Meaning of the word marked with <WSD> tags:  A quart pot. (15th–19th c.)