From Chapter 2:
Peers and squires and parsons and peasants alike smoked. The parson of Thornton, in Buckinghamshire, was so devoted to tobacco that when his supply of the weed ran short, he is said to have cut up the bell-ropes and smoked them! This is dated about 1630. In the well-known description of the famous country squire, Mr. Hastings, who was remarkable for keeping up old customs in the early years of the seventeenth century, we read of how his hall tables were littered with hawks' hoods, bells, old hats with their crowns thrust in, full of pheasants' eggs; tables, dice, cards, and store of tobacco-pipes.

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.