The greater part of Bolingbroke House was taken down in 1778. In the wing of the mansion, left standing, a parlour of round form, and lined with cedar, was long pointed out as the apartment in which Pope composed his Essay on Man; it is said to have been called "Pope's Parlour." The walls may still be seen, but they support a new roof, and can only be distinguished from the rest of the building by their circular form. The mansion was very extensive—forty rooms on a floor.

Upon part of the site was erected a horizontal mill, by Captain Hooper, who also built a similar one at Margate. It consisted of a circular wheel, with large boards or vanes fixed parallel to its axis, and arranged at equal distances from each other. Upon these vanes the wind could act, so as to blow the wheel round. But if it were to act upon the vanes at both sides of the wheel at once, it could not, of course, turn it round; hence one side of the wheel must be sheltered, while the other was submitted to the full action of the wind. For this purpose it was enclosed in a large cylindrical framework, with doors or shutters on all sides, to open and admit the wind, or to shut and stop it. If all the shutters on one side were open, whilst all those on the opposite side were closed, the wind acting with undiminished force on the vanes at one side, whilst the opposite vanes are under shelter, turned the mill round; but whenever the wind changed, the disposition of the blinds must be altered, to admit the wind to strike upon the vanes of the wheel in the direction of a tangent to the circle in which they moved.—(Dr. Paris's Philosophy in Sport.) This mill resembled a gigantic packing-case, which gave rise to an odd story, that when the Emperor of Russia was in England, in 1814, he took a fancy to Battersea Church, and determined to carry it off to Russia, and had this large packing-case made for it; but as the inhabitants refused to let the church be carried away, the case remained on the spot where it was deposited.

This horizontal air-mill served as a landmark for many miles round: the proprietor was Mr. Hodgson, a maltster and distiller. It was visited by Sir Richard Phillips in his Morning's Walk from London to Kew, in 1813, who says: "The mill, its elevated shaft, its vanes, and weather or wind-boards, curious as they would have been on any other site, lost their interest on premises once the residence of the illustrious Bolingbroke, and the resort of the philosophers of his day. In ascending the winding flights of its tottering galleries, I could not help wondering at the caprice of events which had converted the dwelling of Bolingbroke into a malting-house and a mill. This house, once sacred to philosophy and poetry, long sanctified by the residence of the noblest genius of his age, honoured by the frequent visits of Pope, and the birthplace of the immortal Essay on Man, is now appropriated to the lowest uses. The house of Bolingbroke become a windmill! The spot on which the Essay on Man was concocted and produced, converted into a distillery of pernicious spirits! Such are the lessons of time! Such are the means by which an eternal agency sets at nought the ephemeral importance of man! But yesterday, this spot was the resort, the hope, and the seat of enjoyment of Bolingbroke, Pope, Swift, Arbuthnot, Monson, Mallet, and all the contemporary genius of England—yet a few whirls of the earth round the sun, the change of a figure in the date of the year, and the group have vanished; while I behold hogs and horses, malt-bags and barrels, stills and machinery!

"'Alas!' said I to the occupier, 'and have these things become the representatives of more human genius than England may ever witness on one spot again—have you thus satirised the transitory state of humanity—do you thus become a party with the bigoted enemies of that philosophy which was personified in a Bolingbroke or a Pope?' 'No,' he rejoined, 'I love the name and character of Bolingbroke, and I preserve the house as well as I can with religious veneration: I often smoke my pipe in Mr. Pope's parlour, and think of him with due respect as I walk the part of the terrace opposite his room.' He then conducted me to this interesting parlour, which is of brown polished oak,[80] with a grate and ornaments of the age of George the First; and before its window stood the portion of the terrace upon which the malt-house had not encroached, with the Thames moving majestically under its walls.

"'In this room,' I exclaimed, 'the Essay on Man was probably planned, discussed, and written!' Mr. Hodgson assured me this had always been called 'Pope's Room,' and he had no doubt it was the apartment usually occupied by that great poet, in his visits to his friend Bolingbroke. Other parts of the original house remain, and are occupied and kept in good order. He told me, however, that this was but a wing of the mansion, which extended, in Lord Bolingbroke's time, to the churchyard, and is now appropriated to the malting-house and its warehouses."

Sir Richard met with an ancient inhabitant of Battersea, a Mrs. Gilliard, a pleasant and intelligent woman, who well remembered Lord Bolingbroke; that he used to ride out every day in his chariot, and had a black patch on his cheek, with a large wart over his eyebrow. She was then but a girl, but she was taught to look upon him with veneration as a great man. As, however, he spent little in the place, and gave little away, he was not much regarded by the people of Battersea. Sir Richard mentioned to her the names of several of Lord Bolingbroke's contemporaries, but she recollected none, except that of Mallet, whom she said she had often seen walking about in the village while he was visiting at Bolingbroke House.[81]

In the first volume of the Diaries and Correspondence of the Right Hon. George Rose, we find the following entry respecting the treachery of Mallet:—"It appears by a letter of Lord Bolingbroke's, dated in 1740, from Angeville, that he had actually written some Essays dedicated to the Earl of Marchmont, of a very different tendency from his former works. These Essays, on his death, fell into the hands of Mr. Mallet, his executor, who had, at the latter end of his life, acquired a decided influence over him, and they did not appear among his lordship's works published by Mallet;[82] nor have they been seen or heard of since. From whence it must be naturally conjectured, that they were destroyed by the latter, from what reason cannot now be known; possibly, to conceal from the world the change, such as it was, in his lordship's sentiments in the latter end of his life, to avoid the discredit to his former works. In which respect he might have been influenced either by a regard for the noble Viscount's consistency, or by a desire not to impair the pecuniary advantage he expected from the publication of his lordship's works."

Upon this, the Editor of the Diaries, the Rev. Leveson Vernon Harcourt, notes: "The letter to Lord Marchmont here referred to, has a note appended to it by Sir George Rose, the editor of the Marchmont Papers, who takes a very different view of its contents from his father. He gravely remarks, that as the posthumous disclosure of Lord Bolingbroke's inveterate hostility to Christianity lays open to the view the bitterness as the extent of it, so the manner of that disclosure precludes any doubt of the earnestness of his desire to give the utmost efficiency and publicity to that hostility, as soon as it could safely be done; that is, as soon as death could shield him against responsibility to man. Sir George saw plainly enough that when he promised in those Essays to vindicate religion against divinity and God against man, he was retracting all that he had occasionally said in favour of Christianity; he was upholding the religion of Theism against the doctrines of the Bible, and the God of nature against the revelation of God to man."

It is painful to reflect upon this prostration of a splendid intellect; and we are but slightly relieved by Lord Chesterfield's statement, in one of his Letters, published by Lord Mahon, in his edition of Chesterfield's Works (ii. 450), that "Bolingbroke only doubted, and by no means rejected, a future state." We know that Bolingbroke denied to Pope his disbelief of the moral attributes of God, of which Pope told his friends with great joy. How ungrateful a return for this "excessive friendliness" was the indignation which Bolingbroke expressed at the priest having attended Pope in his last moments![83]

It is now, we believe, admitted on all hands that Christianity has not found a very formidable opponent in Bolingbroke, and that his objections, for the most part, only betray his own half-learning. Lord Brougham, whose touching remark we have already quoted, concludes his sketch of Lord Bolingbroke with this eloquent summing up: "Such was Bolingbroke, and as such he must be regarded by impartial posterity, after the violence of party has long subsided, and the view is no more intercepted either by the rancour of political enmity, or by the partiality of adherents, or by the fondness of friendship. Such, too, is Bolingbroke when the gloss of trivial accomplishments is worn off by time, and the lustre of genius itself has faded beside the simple, translucent light of virtue. The contemplation is not without its uses. The glare of talents and success is apt to obscure defects, which are incomparably more mischievous than any intellectual powers can be either useful or admirable. Nor can a lasting renown—a renown that alone deserves to be courted of a rational being—ever be built upon any foundations save those which are laid in an honest heart and a firm purpose, both conspiring to work out the good of mankind. That renown will be as imperishable as it is pure."[84]