From Chapter 4:
Gardiner evidently follows this account, for his version of the story is: "Newcastle strolled towards his coach to solace himself with a pipe. Before he had time to take a whiff, the battle had begun." The incident was made the subject of a picture by Ernest Crofts, A.R.A., which was exhibited at the Royal Academy in 1888. It shows the Duke leaning out of his carriage window, with his pipe in his hand.

From Chapter 8:
Parr is said on one occasion to have called for a pipe after taking a meal at a coaching-inn called the "Bush" at Bristol, when the waiter told him that smoking was not allowed at the Bush. Parr persisted, but the authorities at the inn were firm in their refusal to allow anything so vulgar as smoking on their premises, whereupon Parr is said to have exclaimed: "Why, man, I've smoked in the dining-room of every nobleman in England. The Duchess of Devonshire said I could smoke in every room in her house but her dressing-room, and here, in this dirty public-house of Bristol you forbid smoking! Amazing! Bring me my bill." The learned doctor exaggerated no doubt as regards the facilities given him for smoking; for it was his overbearing way not to ask for leave to smoke, but to smoke wherever he went, whether invited to do so or not; but the story shows the prejudice against smoking which was found in many places as a result of the attitude of the fashionable world towards tobacco.