From the 1840s, the town received numerous Irish immigrants, fleeing the Great Famine. Later additional waves of French Canadians migrated from Quebec. Development was slow until the construction of a series of railroads through the area. These include the Great Western Railway, opened in 1854 and passing through Belle River, and the Canada Southern Railway (later owned by New York Central and Michigan Central), opened in 1872 and passing through Comber. These stimulated the settlement by new migrants from the East.