Like the other settlers, he was prohibited from trade with native Indians, and forced to do business at unfavorable rates with the company store or Governor Printz's private warehouse.
For his own safety, Måns Andersson fled New Sweden for the new Dutch colony founded in 1651 near Fort Casimir, known as Swanwick (Swan Cove).
In September 1655, Fort Casimir was retaken by the Dutch and Andersson signed an oath of allegiance to Governor Stuyvesant with his mark.
[2] Andersson is last mentioned in the diary of a Dutch traveler, Jasper Danckaerts, who wrote, on 4 December 1679, that "towards evening we came to a Swede's named Mouns, where we had to be put across a creek, where we spent the night with him, and were entirely welcome.
"[3] Finnish author and emigrant researcher K-G Olin claims that there is circumstantial evidence that Måns Andersson in fact was a Finn.