The company was formed on 13 July 1871 to take over from the Caithness Railway and construct the line from Helmsdale to Wick and Thurso. On completion on 28 July 1874, the company was absorbed by the Highland Railway, which opened and operated the line.Halkirk, Bower, Watten and Bilbster were closed in 1960, with Hoy, Borrobol Platform and Salzcraggie Platform being closed in 1965.
Butt, R. V. J. (1995). The Directory of Railway Stations: details every public and private passenger station, halt, platform and stopping place, past and present (1st ed.). Sparkford: Patrick Stephens Ltd. ISBN1-8526-0508-1. OCLC60251199.