From Chapter 2:
Tobacco was smoked by all classes and in almost all places. It was smoked freely in the streets. In some verses prefixed to an edition of Skelton's "Elinour Rumming" which appeared in 1624, the ghost of Skelton, who was poet-laureate to King Henry VIII, was made to say that he constantly saw smoking:

As I walked between
Westminster Hall
And the Church of Saint Paul,
And so thorow the citie,
Where I saw and did pitty
My country men's cases,
With fiery-smoke faces,
Sucking and drinking
A filthie weede stinking.

Tobacco-selling was sometimes curiously combined with other trades. A Fleet Street tobacconist of this time was also a dealer in worsted stockings. A mercer of Mansfield who died at the beginning of 1624, and who apparently carried on business also at Southwell, had a considerable stock of tobacco. In the Inventory of all his "cattalles and goods" which is dated 24 January 1624, there is included "It. in Tobacco 19.li 0. 0." Nineteen pounds' worth of tobacco, considering the then value of money, was no small stock for a mercer-tobacconist to carry.

From Chapter 6:
Even children seem to have smoked sometimes in the coffee-houses. Ralph Thoresby, the Leeds antiquary, tells a strange story. He declares that, one evening which he spent with his brother at Garraway's Coffee-house, February 20, 1702, he was surprised to see his brother's "sickly child of three years old fill its pipe of tobacco and smoke it as audfarandly as a man of three score; after that a second and a third pipe without the least concern, as it is said to have done above a year ago." A child of two years of age smoking three pipes in succession is a picture a little difficult to accept as true. As this is the only reference to tobacco in the whole of his "Diary," it is not likely that Thoresby was himself a smoker.