Equivalent Lands

At that time, the surveyors found that Massachusetts Bay had offered Springfield settlers the right to 105,793 acres (428.13 km2) that actually belonged to Connecticut.

The settlers had established themselves in and around the towns of Springfield, Westfield, Suffield, and other areas west of the Connecticut River and believed themselves to be in lands belonging to Massachusetts Bay.

In return, Connecticut would be granted property rights (but not sovereignty) for an equal number of acres within Massachusetts, "as an equivalent to the said colony".

It was completed before summer, and a force of about 70 Native Americans, of the French-allied Abenaki tribe, attacked it on October 11, killing three or four defenders.

[9] Richard Hazzen was sent to survey the area in the winter of 1740–41 to try to determine the boundary line between New Hampshire and Massachusetts Bay Colony.

[9] These areas around Fort Dummer at the time were regarded to be in the New Hampshire colony, although maintenance and protection of the settlements were paid for by Massachusetts Bay.

Therefore, another survey team was sent out in 1749, to once again clarify provincial lines, resulting in the New Hampshire Grants and the subsequent territorial disputes with the New York Colony concerning jurisdiction over parts of the area and its inhabitants.