I've seen photos of wagons of TJ Sharp &Co, Federated Coal & Shipping Co Ltd (Cardiff), Par Harbour, Candy & Co Ltd, Cambrian Rly, LNWR as well as GWR and the clay company 7 plankers carrying coal. North Cornwall CCL, ECC, Hannan Samuel & Co; Hall & Co and the agents Toyne Carter Ltd almost certainly carried coal from local ports to the Linhays in the early days as well as clay to Par and Fowey harbours. These are just a few of many, the problem is finding photos of them!!