This Horton novel is again based in Portsmouth and the surrounding harbours at Portsmouth and Langstone, and this time also around the historic and splendid ruins of Portchester Castle. (Photograph courtesy of the English Heritage web site). It is an impressive ruin of a Roman 'Saxon Shore' fort, originally built in the late 3rd century. "It is the only Roman stronghold in northern Europe whose walls still mainly stand to their full 6 metre height, complete with most of their originally twenty towers," and well worth a visit if you are in the area. With stunning views over Paulsgrove Lake into Portsmouth Harbour it is a magnificent castle with a keep you can climb giving even better views. It is amazingly well preserved. There is also a nice little tea room in the ancient Priory Church of St Mary’s which stands in the Castle grounds. Me thinks Andy Horton and Barney Cantelli will be supping there!