In October 1621 a Thomas Spens was en route from Sweden to England as a servitor of Sir James Spens of Wormiston. As he was passing through the Netherlands Spens was given a letter to deliver from Axel Oxenstierna to Jan Rutgers, the Swedish resident in the Netherlands, to commend Rutgers for his outstanding service to King Gustav II Adolf.
From the accounts of James Spens we can establish that Thomas worked for him for a number of years.
Riksarkivets ämnessamlingar. Personhistoria https://sok.riksarkivet.se/bildvisning/A0073861_00061#?c=&m=&s=&cv=60&xywh=2804%2C1077%2C3644%2C2101
Rikskansleren Axel Oxenstiernas skrifter och brefvexling, first series, II, p.427.