From Chapter 1:
There is little doubt that the smoke of herbs and leaves of various kinds was inhaled in this country, and in Europe generally, long before tobacco was ever heard of on this side the Atlantic. But whatever smoking of this kind took place was medicinal and not social. Many instances have been recorded of the finding of pipes resembling those used for tobacco-smoking in Elizabethan times, in positions and in circumstances which would seem to point to much greater antiquity of use than the form of the pipes supports; but some at least of these finds will not bear the interpretation which has been put upon them, and in other cases the presence of pipes could reasonably be accounted for otherwise than by associating them with the antiquity claimed for them. In any case, the entire absence of any allusions whatever to smoking in any shape or form in our pre-Elizabethan literature, or in mediæval or earlier art, is sufficient proof that from the social point of view smoking did not then exist. The inhaling of the smoke of dried herbs for medicinal purposes, whether through a pipe-shaped funnel or otherwise, had nothing in it akin to the smoking of tobacco for both individual and social pleasure, and therefore lies outside the scope of this book.

From Chapter 6:
Thackeray pictures Dryden as sitting in his great chair at Will's Coffee-house, Russell Street, Covent Garden, tobacco-pipe in hand; but there is no evidence that Dryden smoked. The snuff-box was his symbol of authority. Budding wits thought themselves highly distinguished if they could obtain the honour of being allowed to take a pinch from it. Of Dr. Aldrich, who was Dean of Christ Church, Oxford, and who wrote a curious "Catch not more difficult to sing than diverting to hear, to be sung by four men smoaking their pipes," an anecdote has often been related, which illustrates his devotion to the weed. A bet was made by one undergraduate and taken by another, that at whatever time, however early, the Dean might be visited in his own den, he would be found smoking. As soon as the bet had been made the Dean was visited. The pair explained the reason for their call, when Aldrich, who must have been a good-tempered man, said, "Your friend has lost: I am not smoking, only filling my pipe."