From Chapter 2:
When Robert, Earl of Essex, and Henry, Earl of Southampton, were tried for high treason in Westminster Hall on February 19, 1600-1, the members of the House of Lords, who with the Judges formed the Court, if we may believe the French Ambassador of the time, behaved in a remarkable and unseemly manner. In a letter to Monsieur de Rohan, the Ambassador declared that while the Earls and the Counsel were pleading, their lordships guzzled and smoked; and that when they gave their votes condemning the two Earls, they were stupid with eating and "yvres de tabac"—drunk with smoking. This was probably quite untrue as a representation of what actually took place; but it would hardly have been written had smoking not been a common practice among noble lords.

From Chapter 6:
There was indeed no diminution of tobacco-smoke in the coffee-houses. A visitor from abroad, Mr. Muralt, a Swiss gentleman, writing about 1696, said that character could be well studied at the coffee-houses. He was probably not a smoker himself, for he goes on to say that in other respects the coffee-houses are "loathsome, full of smoke like a guardroom, and as much crowded." He further observed that it was common to see the clergy of London in coffee-houses and even in taverns, with pipes in their mouths. A native witness of about the same date, Ned Ward, writes sneeringly in his "London Spy," 1699, of the interior of the coffee-house. He saw "some going, some coming, some scribbling, some talking, some drinking, some smoking, others jingling; and the whole room stinking of tobacco, like a Dutch scoot, or a boatswain's cabin.... We each of us stuck in our mouths a pipe of sotweed, and now began to look about us." Ward's contemporary, Tom Brown, took a different tone: he wrote of "Tobacco, Cole and the Protestant Religion, the three great blessings of life!"—as strange a jumble as one could wish for.