From Chapter 4:
It is somewhat singular that the Puritans, who denounced most amusements and pleasures, and who frowned upon most of the occupations or diversions that make for gaiety and the enjoyment of life, did not, as Puritans, denounce the use of tobacco. One or two of their writers abused it roundly; but these were not representative of Puritan feeling on the subject. The explanation doubtless is that the practice of smoking was so very general and so much a matter of course among men of all ranks and of all opinions, that the mouths of Puritans were closed, so to speak, by their own pipes. A precisian, however, could take his tobacco with a difference. The seventeenth-century diarist, Abraham de la Pryme, says that he had heard of a Presbyterian minister who was so precise that "he would not as much as take a pipe of tobacco before that he had first sayed grace over it." George Wither, one of the most noteworthy of the poets who took the side of the Parliament, was confined in Newgate after the Restoration, and found comfort in his pipe.

From Chapter 7:
In a World of 1755 there is a description of a noisy, hearty, drinking, devil-may-care country gentleman, in which it is said, "he makes no scruple to take his pipe and pot at an alehouse with the very dregs of the people." In a Connoisseur of 1754 a fine gentleman from London, making a visit in a country-house, is taking his breakfast with the ladies in the afternoon, when they had their tea, for, says he, "I should infallibly have perished, had I staied in the hall, amidst the jargon of toasts and the fumes of tobacco." When Horace Walpole was staying with his father at his Norfolk country-seat, Houghton, in September 1737, Gray wrote to him from Cambridge: "You are in a confusion of wine, and roaring, and hunting, and tobacco, and, heaven be praised, you too can pretty well bear it." But Gray had no objection to tobacco. He lived at Cambridge, and the dons and residents there (as at Oxford), not to speak of the undergraduates, were as partial to their pipes as the men who went out from among them to become country parsons, and to share the country squire's liking for tobacco. Gray wrote to Warton from Cambridge in April 1749 saying: "Time will settle my conscience, time will reconcile me to this languid companion (ennui); we shall smoke, we shall tipple, we shall doze together"—a striking picture of University life in the sleepy days of the eighteenth century. Gray's testimony by no means stands alone. In November 1730 Roger North wrote to his son Montague, then an undergraduate at Cambridge, saying: "I would be loath you should confirm the scandal charged upon the universities of learning chiefly to smoke and to drink."