From Chapter 1:
Every one knows the legend of the water (or beer) thrown over Sir Walter by his servant when he first saw his master smoking, and imagined he was on fire. The story was first associated with Raleigh by a writer in 1708 in a magazine called the British Apollo. According to this yarn Sir Walter usually "indulged himself in Smoaking secretly, two pipes a Day; at which time, he order'd a Simple Fellow, who waited, to bring him up a Tankard of old Ale and Nutmeg, always laying aside the Pipe, when he heard his servant coming." On this particular occasion, however, the pipe was not laid aside in time, and the "Simple Fellow," imagining his master was on fire, as he saw the smoke issuing from his mouth, promptly put the fire out by sousing him with the contents of the tankard. One difficulty about this story is the alleged secrecy of Raleigh's indulgence in tobacco. There seems to be no imaginable reason why he should not have smoked openly. Later versions turn the ale into water and otherwise vary the story.

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.