From Chapter 1:
Every one knows the legend of the water (or beer) thrown over Sir Walter by his servant when he first saw his master smoking, and imagined he was on fire. The story was first associated with Raleigh by a writer in 1708 in a magazine called the British Apollo. According to this yarn Sir Walter usually "indulged himself in Smoaking secretly, two pipes a Day; at which time, he order'd a Simple Fellow, who waited, to bring him up a Tankard of old Ale and Nutmeg, always laying aside the Pipe, when he heard his servant coming." On this particular occasion, however, the pipe was not laid aside in time, and the "Simple Fellow," imagining his master was on fire, as he saw the smoke issuing from his mouth, promptly put the fire out by sousing him with the contents of the tankard. One difficulty about this story is the alleged secrecy of Raleigh's indulgence in tobacco. There seems to be no imaginable reason why he should not have smoked openly. Later versions turn the ale into water and otherwise vary the story.

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."