Castle Stalker, ScotlandCastle Stalker sits on its own tiny island in Loch Laich, Argyll, looking exactly as a Scottish castle should. Four storeys of medieval tower house on a rock barely large enough to hold it, with a single bare tree for company. It's a remarkably photogenic subject, and on this particular afternoon the light was doing most of the work for me. Heavy cloud was rolling in from the right while low sun broke through on the left horizon, backlighting the