Cushman arrived back in London, 17 February 1622. He was carrying with him a valuable document known as the Bradford-Winslow "Relation" – (or historically known as 'Mourt's Relation') the detailed journal-account, that is, day-to-day written record of the exploration of areas of Cape Cod and Plymouth bay and harbour. The "Relation" is the single most important historical document of its kind in early American history. When Robert Cushman arrived in London at the end of February 1622, he hurried to have printed and disseminated 'Mourt's Relation' as quickly and widely as possible, which was obviously meant as propaganda for the colony. The mission of Cushman in aid of the new Plymouth colony was much advanced by his return and arrival in London, 17 February 1622, with the signed approval of the terms of the Adventurers with him. It had been certified by the signatures of the leadership now led by Governor Bradford, successor to John Carver. This document had renewed the relationship between the colonist and the London investors and the investors were also relieved of ingratitude and culpable impropriety. Cushman served as agent of the New Plymouth Colony and representative of the colony with the company of Merchant Adventurers of London until he died in May of 1625. Cushman did not die in London of the plague in 1625. There are no primary sources as evidence for this claim. Robert was visiting Benenden, Kent, the next door village to Rolvenden, where his brother, Richard, lived until Richard died in March 1623/24. Richard Couchman left a will probated in 1624 (PRC/17/65/443, Benenden). The will left a bequest to the children of "brother in lawe Stephen Everenden" (also Evernden). He married Richard and Roberts' sister, Sylvester Coucheman, in Rolvenden on 7 Nov 1593. Robert Cushman intended to sail to Plymouth Colony and was visiting his relatives before he left. William Bradford, in his book Of Plymouth Plantation, wrote that Cushman's "own purpose was to come over and spend his [last] days with them". The St. Georges, Benenden archdeacon's transcript, primary source, record was May 6, 1625 "The 6 day Roberte Couchman a stranger." It was usual to identify a person as a "stranger" if they were from another parish.