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 5:
If the restored king did not himself smoke, tobacco was far from unknown at the Palace of Whitehall. We get a curious glimpse of one aspect of life there in the picture which Lilly, the notorious astrologer, paints in his story of his arrest in January 1661. He was taken to Whitehall at night, and kept in a large room with some sixty other prisoners till daylight, when he was transferred to the guardroom, which, he says, "I thought to be hell; some therein were sleeping, others swearing, others smoaking tobacco. In the chimney of the room I believe there was two bushels of broken Tobacco Pipes, almost half one load of ashes." What would the king's grandfather, the author of the "Counterblaste," have said, could he have imagined such a spectacle within the palace walls?