Believe this relates to the rather involved & lengthly controversy
between NY and NH over the "Hampshire Grants"-the area that later
became Vermont.

Some general sources you might try are:

Dow, Peter E.:   Bucking the tide : Charles Phelps and the Vermont
land
                      grant controversies, 1750-1789,    1990.

Jones, Matt Bushnell: Vermont in the making, 1750-1777.  [Hamden,
Conn.]
              Archon Books, 1968 [c1939]

Middleton, Lamar: Revolt U.S.A.  Freeport, N.Y., Books for Libraries
Press               [1968]

Interestingly enough, Ethan Allen began his career as leader of a
band of terrorists regularly looting and burning the homesteads of
settlers in the 'disputed territories' holding land grants from New
York.
--
Greg Furness
Research Associate
NY State Office of Parks, Recreation
and Historic Preservation