When we flick through war photography now, we half expect raw, sometimes shocking snapshots of the front lines, muddy trenches, bombed-out cities, and human suffering caught in a single shutter click. But wind the clock back to the 1850s and photography was a different beast altogether: heavy, chemical-laden, and demanding hours of patience rather than split-second timing. Into this world stepped Roger Fenton, a barrister-turned-photographer with a keen sense of adventure and