From Chapter 3:
Many good folk would seem to have associated smoking with idling. In the rules of the Grammar School at Chigwell, Essex, which was founded in 1629, it is prescribed that "the Master must be a man of sound religion, neither a Papist nor a Puritan, of a grave behaviour, and sober and honest conversation, no tippler or haunter of alehouses, no puffer of tobacco." A worthy Derbyshire man named Campbell, in his will dated 20 October 1616, left all his household goods to his son, "on this condition that yf at any time hereafter, any of his brothers or sisters shall fynd him takeing of tobacco, that then he or she so fynding him, shall have the said goods"—a testamentary arrangement which suggests to the fancy some amusing strategic evasions and manœuvres on the part of the conditional legatee and his watchful relations.

From Chapter 5:
The belief in the prophylactic power of tobacco was, however, very generally held. When Mr. Samuel Pepys on June 7, 1665, for the first time saw several houses marked with the ominous red cross, and the words "Lord, have mercy upon us" chalked upon the doors, he felt so ill at ease that he was obliged to buy some roll tobacco to smell and chew. There is nothing to show that Pepys even smoked, which considering his proficiency in the arts of good-fellowship, is perhaps a little surprising. Defoe, in his fictitious but graphic "Journal of the Plague Year in London," says that the sexton of one of the London parishes, who personally handled a large number of the victims, never had the distemper at all, but lived about twenty years after it, and was sexton of the parish to the time of his death. This man, according to Defoe, "never used any preservative against the infection other than holding garlic and rue in his mouth, and smoking tobacco."