Incarnated, at the moment, by Cameron Green, the director of interpretation at historic Fort Ticonderoga, Arnold had spent much of this May Friday on horseback. Sixty rain-numbed Revolutionary War reenactors had sloshed in his wake, marching up forest trails and past a Texaco station, in period-correct leather buckle shoes (not engineered to withstand repeated impact with modern Vermont’s asphalt highways) and period-correct wool coats (now ponderously wet, stinking of sheep). “Give ’em hell, boys!” a local resident had hollered from his farmhouse.