From Chapter 2:
King James himself is an unwilling witness to the popularity of tobacco. He tells us that a man could not heartily welcome his friend without at once proposing a smoke. It had become, he says, a point of good-fellowship, and he that would refuse to take a pipe among his fellows was accounted "peevish and no good company." "Yea," he continues, with rising indignation, "the mistress cannot in a more mannerly kind entertain her servant than by giving him out of her fair hand a pipe of tobacco."

From Chapter 8:
Another famous parson, the Rev. John Newton, was a smoker, and so was Cowper's other clerical friend, that learned and able Dissenter, the Rev. William Bull, whose whole mien and bearing were so dignified that on two occasions he was mistaken for a bishop. Cowper appreciated snuff, but did not care for smoking, and when he wrote to Unwin, describing his new-made friend in terms of admiration, he concluded—"Such a man is Mr. Bull. But—he smokes tobacco. Nothing is perfection 'Nihil est ab omni parte beatum.'" Bull, however, was not excessive in his smoking, for his daily allowance was but three pipes. In his garden at Newport Pagnell, Bull showed Cowper a nook in which he had placed a bench, where he said he found it very refreshing to smoke his pipe and meditate. "Here he sits," wrote Cowper, "with his back against one brick wall, and his nose against another, which must, you know, be very refreshing, and greatly assist meditation."