From Chapter 4:
In this "Diary," covering the years 1631-43, there are some forty entries concerning the purchase of what is always, save in one case, called "tobacka." These entries give valuable information as to the prices of the two chief kinds of tobacco. One was imported from Spanish America, which up to 1639 Hayne calls "Varinaes," and after that date "Spanish"; the other was imported from English colonies—chiefly from Virginia. The "Varinaes" kind, Dr. Brushfield suggests, was obtained from Varina, near the foot of the range of mountains forming the west boundary of Venezuela, and watered by a branch of the Orinoco River. Hayne also notes the purchase of "Tertudoes" tobacco, but what that may have been I cannot say. From the various entries relating respectively to Varinaes or Spanish tobacco, and to Virginia tobacco, it is clear that the former ranged in price from 8s. to 13s. per lb., while the latter was from 1s. 6d. to 4s. per lb. There is one entry of "perfumed Tobacka," 10 oz. of which were bought at the very high price of 15s. 6d.

From Chapter 8:
All's well that ends well; but one cannot help wondering what kind of tobacco it was that the Birmingham tradesman used, a half pipeful of which had such a deadly effect—but perhaps the effect was due to the salt, not to the tobacco.
In the year after that which witnessed Coleridge's adventure, i.e. in 1796, a tobacco-box with a history was the subject of a legal decision. This box, made of common horn and small enough to be carried in the pocket, was bought for fourpence by an overseer of the poor in the time of Queen Anne, and was presented by him in 1713 to the Society of Past Overseers of the parish of St. Margaret, Westminster. In 1720 the Society, in memory of the donor, ornamented the lid with a silver rim; and at intervals thereafter additions were made to an extraordinary extent to the box and its casings. Hogarth engraved within the lid in 1746 a bust of the victor of Culloden. Gradually the horn box was enshrined within one case after another—usually silver lined with velvet—each case bearing inscribed plates commemorating persons or events. A Past Overseer who detained the box in 1793 had to give it back after three years of litigation. A case of octagon shape records the triumph of Justice, and Lord Chancellor Loughborough pronouncing his decree for the restitution of the box on March 5, 1796. In later days many and various additions have been made to the many coverings of the box, recording public events of interest.