After leaving the military, Tamberlin and family move to the St. John River Valley somewhere between Saint John and Fredericton, likely at or near Maugerville.

In Earnest A. Clark's "Tamberlane" it says:
a sale wasrecorded "1 September 1782, lot #7 nearly opposite Belle Islepoint in the Long Reach, containing 200 acres, to Tam Campbell".

In a 1783 report it is said:
AMESBURY TOWNSHIP.
"Tamerlane Campbell has a log cabin and about two acres of land cleared, has been on the river about four years, but on the lot he now possesses about one year, is a loyal subject, and fought under General Carleton at the attack on Quebec early in the late troubles. Has a wife and five children. We beg leave to have him confirmed in his possessions."