From Chapter Chapter 8:
He describes the box and its contents in lines which show not only tolerance but appreciation of tobacco, from which it is not unreasonable to infer that Cowper's first view of his friend's smoking-habit as a drawback—as shown in his letter to Unwin, quoted above—had been modified by neighbourhood and custom. It might have been well for the poet himself if he had learned to smoke a social pipe with his friend Bull. The appreciative lines run thus:

This oval box well filled
With best tobacco, finely milled,
Beats all Anticyra's pretences
To disengage the encumbered senses.
O Nymph of transatlantic fame,
Where'er thine haunt, whate'er thy name,
Whether reposing on the side
Of Oronoco's spacious tide,
Or listening with delight not small
To Niagara's distant fall,
'Tis thine to cherish and to feed
The pungent nose-refreshing weed,
Which, whether pulverized it gain
A speedy passage to the brain,
Or whether, touched with fire, it rise
In circling eddies to the skies,
Does thought more quicken and refine
Than all the breath of all the Nine—
Forgive the bard, if bard he be,
Who once too wantonly made free,
To touch with a satiric wipe
That symbol of thy power, the pipe;
        *     *     *     *     *     *     *
And so may smoke-inhaling Bull
Be always filling, never full.

From Chapter 15:
Notwithstanding the few examples given above, tobacconists, more than most tradesmen, seem to have continued to use signs that had at least some relevance to their trade. Abel Drugger was a "tobacco-man," i.e. a tobacco-seller in Ben Jonson's play of "The Alchemist," 1610, so that it is not very surprising to find the name used occasionally as a tobacconist's sign. Towards the end of the eighteenth century one Peter Cockburn traded as a tobacconist at the sign of the "Abel Drugger" in Fenchurch Street, and informed the public on the advertising papers in which he wrapped up his tobacco for customers that he had formerly been shopman at the Sir Roger de Coverley—a notice which has preserved the name of another tobacconist's sign borrowed from literature. Seventeenth—century London signs were the "Three Tobacco Pipes," "Two Tobacco Pipes" crossed, and "Five Tobacco Pipes." At Edinburgh in the eighteenth century there were tobacconists who used two pipes crossed, a roll of tobacco and two leaves over two crossed pipes, and a roll of tobacco and three leaves.