2021-7-10 · The history of Longford Quarries dates back to the mid 1800s and by 1895 there were four companies mining limestone in the Longford area. Owners were listed as R. H. Hill, George Thomson, Allan McPherson and Andrew Tait, who also had a shingle mill at the foot of Colborne Street and built the Glenorma mansion at 59 Colborne St. E. for his family.