Sentence:  I once more desire my readers to consider that as I cannot keep an ingenious man to go daily to Will's under twopence each day merely for his charges, to White's under sixpence, nor to the Grecian without allowing him some plain Spanish, to be as able as others at the learned table; and that a good observer cannot speak with even <WSD>Kidney</WSD> at St. James's without clean linen; ... 
Meaning of the word marked with <WSD> tags:  A waiter.