if you are a fisherman in the I. Walton mould there is probably no more stunning place to fish than the Tweed under the walls of Norham castle an ancient outpost of England held by the Prince Bishops of Durham as the first line of defence against marauding Scots. It fell only once-to King James IV on his way to make a horlicks of Flodden. He had at his disposal a massive weapon of mass destruction-a huge cannon bought down from Embra and which could methodically pound the castle to pieces well out of range of the cannons of the defenders. So they surrendered well before full time. Fishermen do not seem to know all this as they cast all day -but on this occasion-without reward. No, Curious of Cowdenbeath, the left hand picture is not upside down-it is looking down onto a riple free Tweed with the clouds reflected in the water.  ¶ 5:35 PM