Canada experienced heavy European immigration in the mid-19th century, especially from Ireland which experienced famine in the 1840s. As the land south of the Severn was settled, the government planned to open the Muskoka region further north to settlement. Logging licenses were issued in 1866 which opened Monck Township to logging. The lumber industry expanded rapidly denuding huge tracts of the area, but also prompted the development of road and water transportation. The railroad pushed north to support the industry, reaching Gravenhurst in 1875 and Bracebridge in 1885. Road transportation took the form of the Muskoka Colonization Road, begun in 1858 and reaching Bracebridge in 1861. The road was roughly hewn from the woods and was of corduroy construction, meaning logs were placed perpendicular to the route of travel to keep carriages from sinking in the mud and swamps, making for extremely rugged travel. The lumbering industry spawned a number of ancillary developments, including as mentioned, transport, but also settlements began springing up to supply the workers and Bracebridge, (formerly North Falls) saw some leather tanning businesses develop. Tanners used the bark from lumber to tan hides thereby using what otherwise would be a waste product.