According to Burke's Landed Gentry (2010), his family—the Thomsons of Corstorphine—are direct descendants of a great-grandson of King Robert II of Scotland, namely, Sir Thomas Stewart, Master of Mar.
Agnes' nephew, David Foulis, Baron Ingleby, was King James' ambassador to England's Queen Elizabeth I.
[1] David was named heir to his father in 1607 during a "Retour", return to Chancery, "an inquest that took place in the court of the sheriffdom of Edinburgh held in the town-house of the same burgh in the presence of Mr. William Stewart Sheriff."
In 1606, at age 14, Thomson was sent by his mother's employer, Ferdinando Gorges to Maine as part of an attempt to establish Popham Colony.
[7] A few months after the departure of the Mayflower and Speedwell (1577 ship), Thompson also crossed the Atlantic again and stayed at Pannaway Plantation until 1622.
The colony that became the state of New Hampshire was founded on a 6,000-acre (2,400 ha) land grant given in 1622 by the Council for New England to Mr. David Thomson, gent.
David Thompson first settled at Odiorne's Point in Rye (near Portsmouth) with a group of craftsmen and fishermen from England[8] in 1623, just three years after the Pilgrims landed at Plymouth.
The settlers built a fort, manor house, and other buildings, some for fish processing, on Flake Hill at the mouth of the Piscataqua River, naming the settlement Pannaway Plantation.
In 1623, the English explorer Christopher Levett, an associate of Gorges and a member of the Council for New England, wrote of visiting Thompson at his Pannaway Plantation.
[12] Early historians used to believe the first native-born New Hampshirean, John Thompson, was born there; later he was found to have been baptized at St. Andrew's Parish in Plymouth, England, in 1619.
In 1629, following Thomson's death, Captain John Mason (former governor of Newfoundland) and Sir Ferdinando Gorges (who founded Maine) granted the territory to themselves.