Homer was born in Barrington, Nova Scotia but later moved to the British Columbia Colony. Homer eventually became a merchant and eventually High Sheriff for the colony. In that capacity, he declared the union with Vancouver Island on behalf of Governor Frederick Seymour in 1866. Homer was a Liberal-Conservative candidate in New Westminster during the 1874 federal election but lost to Liberal James Cunningham. Homer was later elected Member of Parliament in an 1882 by-election when incumbent Thomas Robert McInnes resigned to accept an appointment in the Senate. His election was confirmed in the general election only six months later. Homer died in office before he could complete the term.