Darby and his brother Patrick travelled from Kilballyowen, County Wicklow Ireland in 1854. They took land grants with several other families, (Kellys, McCabes, Finnigans, O’Neills, Doyles) from the same area in Ireland, along the colonization road known as the Old Hastings Road. The cluster of farms was originally known as Kavanagh Settlement because Darby established a Way station, General Store, and Post Office on his land. Darby was the reeve of the united townships of Faraday and Dungannon for more than twenty years and in 1886 he was the first Warden of Hastings county from the northern townships. From the 1860’s he was roads superintendent and was responsible for the road construction along the old Hastings Road.
Kavanagh Settlement, like many other small communities formed before confederation had its name changed to Umfraville, in 1867 when the Canadian Postal Service was started.
Darby married Anastasia Kelly in 1864 and together they raised seven children. Their second born child Thomas died when only an infant. He is buried in the cemetery at Umfraville.