From Chapter 1:
Another tradition gives the old Pied Bull at Islington, long since demolished, as the scene of the momentous event. It is said in its earlier days to have been a country house of Sir Walter's, and according to legend it was in his dining-room in this house that he had his first pipe. Hone, in the first volume of the "Every Day Book" tells how he and some friends visited this Pied Bull, then in a very decayed condition, and smoked their pipes in the dining-room in memory of Sir Walter. From the recently published biography of William Hone by Mr. F.W. Hackwood, we learn that the jovial party consisted of William Hone, George Cruikshank, Joseph Goodyear, and David Sage, who jointly signed a humorous memorandum of their proceedings on the occasion, from which it appears that "each of us smoked a pipe, that is to say, each of us one or more pipes, or less than one pipe, and the undersigned George Cruikshank having smoked pipes innumerable or more or less," and that "several pots of porter, in aid of the said smoking," were consumed, followed by bowls of negus made from "port wine @ 3s. 6d. per bottle (duty knocked off lately)" and other ingredients. Speeches were made and toasts proposed, and altogether the four, who desired to "have the gratification of saying hereafter that we had smoked a pipe in the same room that the man who first introduced tobacco smoked in himself," seem to have thoroughly enjoyed themselves.

From Chapter 8:
A famous crony of Parr's, the learned Porson, was another devotee of tobacco. In November 1789 Parr wrote to Dr. Burney: "The books may be consulted, and Porson shall do it, and he will do it. I know his price when he bargains with me; two bottles instead of one, six pipes instead of two, burgundy instead of claret, liberty to sit till five in the morning instead of sneaking into bed at one: these are his terms:" and these few lines, it may be added, give a graphic picture of Porson. According to Maltby, Porson once remarked that when smoking began to go out of fashion, learning began to go out of fashion also—which shows what nonsense a learned man could talk.