14 Aug 1787
Channabank, Abbey St Bathans, Berwickshire, Scotland 
22 Aug 1787
Abbey St Bathans, Berwickshire, Scotland
entry reads: Robert Fairbairn Son to John Fairbairn in Channabank was Born 14th and Baptized 22nd Augt 1787 Witnesses James Trotter & Robt Fairbairn 
1828 to 1857
Darlington, Ontario, Canada
The following extract is taken from the Bowmanville Statesman:
THE POST OFFICE
"the first post office in Darlington, the township in which Bowmanville is situated, was at Black's Hill, five miles west of the present town, on the Kingston road, Colonel Black being the postmaster. The office was, however, removed to the town on July 1st, 1827. Darlington being then the name of the place. Robert Fairbairn, J. P. was appointed first postmaster July 5, 1828 the ninth year of the reign of George IV. Mr. Fairbairn's son, the present postmaster, came into the office as assistant in August, 1845 and was appointed to succeed his father, January 28, 1857. Hon. Robert Spence being Postmaster General. Mr. Fairbairn was born in 1831, so he has practically been in charge of the office from the age of thirteen, and thus becomes, no doubt, by length of service, though not by age, the oldest postmaster in Ontario, if not in the Dominion. A unique feature of the management is the fact that during the long period of seventy-seven years covered by the services of father and son, only one registered letter has been lost, and that was stolen when the post office was destroyed by fire in 1845. 
It may be possible to confirm family relationships with Robert by comparing test results with other carriers of his ancestors' Y-chromosome or mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share DNA with Robert: