The Evangelical Admiral Gambier, notorious for distributing tracts to his fleet in a theatre of war, is commonly seen as a misfit in a fighting service that had scant time for fervent piety. In fact, the navy of the Revolutionary and Napoleonic Wars showed a level of religious observance not seen since the days of Queen Anne. Evangelical laymen provided one dynamic for this change: concentrating first on public worship, they moved to active proselytism...