From Chapter 1:
King James, in his reference to the "first Author" of what he calls "this abuse," clearly had Sir Walter Raleigh in view, and it is Raleigh with whom in the popular mind the first pipe of tobacco smoked in England is usually associated. The tradition is crystallized in the story of the schoolboy who, being asked "What do you know about Sir Walter Raleigh?" replied: "Sir Walter Raleigh introduced tobacco into England, and when smoking it in this country said to his servant, 'Master Ridley, we are to-day lighting a candle in England which by God's blessing will never be put out'"!

From Chapter 8:
The allusion in these verses to a "satiric wipe" refers to a passage in the poem entitled "Conversation," which Cowper had written in the previous year, 1781. In this passage tobacco is abused in terms which Cowper clearly felt to need modification after his personal intercourse with such a smoker as his friend Bull. In describing, in "Conversation," the manner in which a story is sometimes told, the poet says:

The pipe, with solemn interposing puff,
Makes half a sentence at a time enough;
The dozing sages drop the drowsy strain,
Then pause and puff—and speak, and pause again.
Such often, like the tube they so admire,
Important triflers! have more smoke than fire.