From Chapter 1:
In the Wallace Collection at Hertford House is a pouch or case labelled as having belonged to and been used by Sir Walter Raleigh. This pouch contains several clay pipes. It was perhaps this same pouch or case which once upon a time figured in Ralph Thoresby's museum at Leeds, and is described by Thoresby himself in his "Ducatus Leodiensis," 1715. Curiously enough, a few years ago when excavations were being made around the foundations of Raleigh's house at Youghal a clay pipe-bowl was dug up which in size, shape, &c., was exactly like the pipes in the Wallace exhibit. Raleigh lived and no doubt smoked in the Youghal house, so it is quite possible that the bowl found belonged to one of the pipes actually smoked by him. In the garden of the Youghal house, by the way, they used to show the tree—perhaps still do so—under which Raleigh was sitting, smoking his pipe, when his servant drenched him. Thus the tradition, which, as we have seen, dates from 1708 only, has obtained two local habitations—Youghal and Durham House on the Adelphi site.

From Chapter 5:
When excavations were in progress early in 1901, preparatory to the construction of Kingsway and Aldwych, they included the removal of bodies from the burying-grounds of St. Clement Danes and St. Mary-le-Strand; and among the bones were found a couple of the curious tobacco-pipes called "plague-pipes," because they are supposed to have been used as a protection against infection by those whose office it was to bury the dead. These pipes have been dug up from time to time in numbers so large that one antiquary, Mr. H. Syer Cuming, has ventured to infer that "almost every person who ventured from home invoked the protection of tobacco."