From Chapter 3:
A further witness to the prevalence of smoking and to the enormous number of tobacco-sellers' shops is Camden, the antiquary. In his "Annales," 1625, he remarks with curious detail that since its introduction—"that Indian plant called Tobacco, or Nicotiana, is growne so frequent in use and of such price, that many, nay, the most part, with an insatiable desire doe take of it, drawing into their mouth the smoke thereof, which is of a strong scent, through a pipe made of earth, and venting of it againe through their nose; some for wantownesse, or rather fashion sake, and other for health sake, insomuch that Tobacco shops are set up in greater number than either Alehouses or Tavernes."

From Chapter 5:
When plague was abroad even children were compelled to smoke. At the time of the dreadful visitation of 1665 all the boys at Eton were obliged to smoke in school every morning. One of these juvenile smokers, a certain Tom Rogers, years afterwards declared to Hearne, the Oxford antiquary, that he never was whipped so much in his life as he was one morning for not smoking. Times have changed at Eton since this anti-tobacconist martyr received his whipping. It is sometimes stated that at this time smoking was generally practised in schools, and that at a stated hour each morning lessons were laid aside, and masters and scholars alike produced their pipes and proceeded to smoke tobacco. But I know of no authority for this wider statement; it seems to have grown out of Hearne's record of the practice at Eton.