The two elder children, Daniel and Abigail, remained with their father, while the infant daughter, Mercy, accompanied her mother, who subsequently remarried.
Denton left New York for England in 1670 (which may have occasioned his divorce), and there he evidently participated in settlement enterprises and possibly in the newly acquired (by the English) fur trade.
The work was a promotional tract designed to encourage English settlement of territories recently seized from the Dutch.
The tract is perhaps most famous for its early statement of Manifest Destiny: how "a Divine Hand makes way for them [the English settlers] by removing or cutting off the Indians, either by Wars one with the other, or by some raging mortal Disease."
The linked article (below) gives a brief account of his life and career, and discusses his vision for the westward expansion of English culture and his representation of the American wilderness as an agrarian frontier.