From Chapter 4:
So far Markham: but according to another account, when Rupert told him that there would be no battle, the Duke betook himself to his coach, "lit his pipe, and making himself very comfortable, fell asleep." The original authority, however, for the whole story is to be found in a paper of notes by Clarendon on the affairs of the North, preserved among his MSS. In this paper Clarendon writes: "The marq. asked the prince what he would do? His highness answered, 'Wee will charge them to-morrow morninge.' My lord asked him whether he were sure the enimy would not fall on them sooner? He answered, 'No'; and the marquisse thereupon going to his coach hard by, and callinge for a pype of tobacco, before he could take it the enimy charged, and instantly all the prince's horse were routed."

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."