From Chapter 2:
Tobacco engages
Both sexes, all ages,
The poor as well as the wealthy;
From the court to the cottage,
From childhood to dotage,
Both those that are sick and the healthy.

This chapter and the next deal with the history of smoking during the first fifty years after its introduction as a social habit—roughly to 1630.

The use of tobacco spread with extraordinary rapidity among all classes of society. During the latter part of Queen Elizabeth's reign and through the early decades of the seventeenth century tobacco-pipes were in full blast. Tobacco was triumphant.

From Chapter 8:
smoking had certainly not died out at Cambridge, even at the time when Denison was at Oxford. According to the "Gradus ad Cantabrigium," 1824, the Cambridge smart man's habit was to dine in the evening "at his own rooms, or at those of a friend, and afterwards blows a cloud, puffs at a segar, and drinks copiously." The spelling of "segar" shows that cigars were then somewhat of a novelty.