From Chapter 3:
It is pretty clear that not a few of the druggists who sold tobacco were great rascals. Ben Jonson has let us into some of their secrets of adulteration—the treatment of the leaf with oil and the lees of sack, the increase of its weight by other artificial additions to its moisture, washing it in muscadel and grains, keeping it in greased leather and oiled rags buried in gravel under ground, and by like devices. Other writers speak of black spice, galanga, aqua vitæ, Spanish wine, aniseeds and other things as being used for purposes of adulteration.

From Chapter 7:
Hogarth's subscription ticket for the print of Sigismunda was Time smoking a Picture (1761). It represents an old man sitting on a fragment of statuary and smoking a long pipe against a picture of a landscape which stands upon an easel before him. Below, on his left, is a large jar labelled "Varnish." The figure of Time is nude and has large wings. Volumes of smoke are pouring against the surface of the picture from both his mouth and the bowl of his long clay pipe. In The Stage-Coach, or Country Inn-yard, is shown an old woman smoking a pipe in the "basket" of the coach. The plate of The Distrest Poet (1736) shows four books and three tobacco-pipes on a shelf. In the second of the "Election" series—the Canvassing for Votes (1755)—a barber and a cobbler, seated at the table in the right-hand corner, are both smoking long pipes. Apparently they are discussing the taking of Portobello by Admiral Vernon in 1739 with only six ships; for the barber is illustrating his talk by pointing with his twisted pipe-stem to six fragments which he has broken from the stem and arranged on the table in the shape of a crescent. In the frontispiece which Hogarth drew in 1762 for Garrick's farce of "The Farmer's Return from London," the worthy farmer, seated in his great chair, holds out a large mug in one hand to be filled with ale, while the other supports his long pipe, which he is smoking with evident enjoyment.