From Chapter 3:
Another proof of the extraordinary popularity of the new habit is to be found in the fact that by the seventeenth year of the reign of James I—the arch-enemy of tobacco—that is, by 1620, the Society of tobacco-pipe-makers had become so very numerous and considerable a body that they were incorporated by royal charter, and bore on their shield a tobacco plant in full blossom. The Society's motto was happily chosen—"Let brotherly love continue."

From Chapter 5:
These seventeenth-century pipes were largely made in Holland of pipe-clay imported from England—to the disgust and loss of English pipe-makers. In 1663 the Company of tobacco-Pipe Makers petitioned Parliament "to forbid the export of tobacco pipe clay, since by the manufacture of pipes in Holland their trade is much damaged." Further, they asked for "the confirmation of their charter of government so as to empower them to regulate abuses, as many persons engage in the trade without licence." The Company's request was granted; but in the next year they again found it necessary to come to Parliament, showing "the great improvement in their trade since their incorporation, 17 James I, and their threatened ruin because cooks, bakers, and ale-house keepers and others make pipes, but so unskilfully that they are brought into disesteem; they request to be comprehended in the Statute of Labourers of 5 Elizabeth, so that none may follow the trade who have not been apprentices seven years."