1669 Census- No Manskin
In October 1669, when a census was made of the colony's Indian population, eighteen Native groups were recognized whose 725 warriors were distributed throughout eight Tidewater counties. … Five Native groups were living in New Kent County, which then encompassed land now within the boundaries of King and Queen and King William Counties. Of these bowmen (warriors were the only segment of the population included in the census) there were 20 Mattaponi, 60 Chickahominy, 50 Pamunkey, 30 Rappahannock, and 40 Totachus
Martha McCartney
http://www.cr.nps.gov/history/online_books/jame1/moretti-langholtz/chap4.htm
By this time, the Manskin had truly ceased to exist.