Sentence:  Tyrian garbs, / Neptunian Albion's high teſtaceous food ["i.e.", oysters], / And flavour'd Chian wines with incenſe fum'd / To <WSD>ſlake</WSD> Patrician thirſt: for theſe, their rights / In the vile ſtreets they proſtitute to ſale; / Their ancient rights, their dignities, their laws, / Their native glorious freedom. 
Meaning of the word marked with <WSD> tags:  To satisfy (thirst, or other desires); to quench; to extinguish. (from 14thc.)