A floral sundial in the nearby Lauderdale House bears an inscription quoting lines from his poem "The Garden". He died suddenly in 1678, while in attendance at a popular meeting of his old constituents at Hull. His health had previously been remarkably good; and it was supposed by many that he was poisoned by some of his political or clerical enemies. Marvell was buried in the church of St Giles in the Fields in central London. His monument, erected by his grateful constituency, bears the following inscription:
A 1678 work published anonymously ("by a Protestant") in defense of John Howe against the attack of his fellow-dissenter, the severe Calvinist Thomas Danson, is also probably by Marvell. Its full title is Remarks upon a late disingenuous discourse, writ by one T.D. under the pretence de causa Dei, and of answering Mr. John Howe's letter and postscript of God's prescience, &c., affirming, as the Protestant doctrine, that God doth by efficacious influence universally move and determine men to all their actions, even to those that are most wicked.