From Chapter 1:
The form and make of the first pipe is a matter I do not propose to go into here; but in connexion with the first pipe smoked in this country Aubrey's interesting statements must be given. Writing in the time of Charles II, he said that he had heard his grandfather say that at first one pipe was handed from man to man round about the table. "They had first silver pipes; the ordinary sort made use of a walnut shell and a straw"—surely a very unsatisfactory pipe. Tobacco in those earliest days, he says, was sold for its weight in silver. "I have heard some of our old yeomen neighbours say that when they went to Malmesbury or Chippenham Market, they culled out their biggest shillings to lay in the scales against the tobacco."

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.