Castlehead in its heyday had several major players in the shipping industry. If that seems surprising today, bear in mind that until two thirds of the way through the twentieth century the Clyde was one of the world's busiest ports. Every shipping line worthy of the name had offices in Glasgow and there were scores of ship managers and brokers to handle the business of the smaller fry. It was a lucrative business, and Castlehead's moguls did not miss the opportunity.