The Caledonian Railway (CR) was a major Scottish railway company. It was formed in the early 19th century with the objective of forming a link between English railways and Glasgow. It progressively extended its network and reached Edinburgh and Aberdeen, with a dense network of branch lines in the area surrounding Glasgow. It was absorbed into the London, Midland and Scottish Railway in 1923. Many of its principal routes are still used, and the original main line between Carlisle and Glasgow is in use as part of the West Coast Main Line railway.

George Heald was a civil engineer active at the beginning of the 19th century, notable for his role in the building of railways that formed part of the Grand Junction Railway, the Lancaster and Carlisle Railway, the Caledonian Railway and the North Midland Railway. Nowadays he is largely forgotten but to his contemporaries and those that followed immediately afterwards, he was one of the key engineers of the early railway age being listed alongside Brunel, Stephenson, Locke and Cubitt in George Drysdale Dempsey's book, the Practical Railway Engineer. He was a colleague and friend of Robert Stephenson and also worked with other notable railway engineers such as Joseph Locke and Thomas Brassey.