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 7:
At Oxford in early Georgian days a profound calm—so far as study was concerned—appears to have prevailed. Little work was done, but much tobacco was smoked. In 1733 a satire was published, violently attacking the Fellows of various colleges. According to this satirist the occupation of the Magdalen Fellow was to
drink, look big,
Smoke much, think little, curse the freeborn Whig—

from which it may not unreasonably be surmised that the author was a Tory; and however little enthusiasm there may have been at Oxford in those days for learning and study, there was plenty of life in political animosities.

Another witness to the dons' love of tobacco is Thomas Warton. In his "Progress of Discontent," written in 1746, he plaintively sang:

Return, ye days when endless pleasure
I found in reading or in leisure!
When calm around the Common Room
I puff'd my daily pipe's perfume!
Rode for a stomach, and inspected,
At annual bottlings, corks selected:
And dined untax'd, untroubled, under
The portrait of our pious Founder!