In Mourt’s Relation, published in 1622, we learn that Warren was chosen, when the Mayflower stopped at Cape Cod before reaching Plymouth, to be a member of the exploring party among 10 passengers (and 8 crew), and he was described as being “of London” among 3 men. Charles Edward Banks, in Ancestry and Homes of the Pilgrim Fathers writes: “Richard Warren came from London and was called a merchand of that city (by Mourt) Extensive research in every available source of information — registers, chancery, and probate, in the London courts, proved fruitless in an attempt to identify him.”
He was not of the Leiden, Holland, Pilgrims, but joined them in Southampton, England to sail on the Mayflower.
Richard Warren received his acres in the Division of Land in 1623. In the 1627 Division of Lands and Cattle, in May of 1627, “RICHARD WARREN of the Mayflower” was given “one of the black heifers, 2 she-goats, and a grant of 400 acres (1.6 km2) of land” at the Eel River (Plymouth, Massachusetts). The Warren house built in that year (1627) stood at the same location as the present house; it was re-built about 1700, at the head of Clifford Road, with its back to the sea, and later owned by Charles Strickland (in 1976).
Warren died a year after the division, in 1628, the only record of his death being found as a brief note in Nathaniel Morton’s 1669 book New England’s Memorial, in which Morton writes:
- “This year  died Mr. Richard Warren, who hath been mentioned before in this book, and was a useful instrument; and during his life bore a deep share in the difficulties and troubles of the first settlement of the plantation of New Plimouth.”
- -Nathaniel Morton, New England’s Memorial (Boston : John Usher, 1669