The Free Fishers: Authorised Edition by John Buchan
When Anthony Lammas, minister of the Kirk and Professor of Logic at St Andrews University, leaves his home town for London on business, he little imagines that within two days he will be deeply entangled in a web of mystery and intrigue. But he's no ordinary professor. His boyhood allegiance to a brotherhood of deep-sea fishermen is to involve him and handsome ex-pupil, Lord Belses, with a beautiful but dangerous woman.
Set in the bleak Yorkshire hamlet of Hungrygrain during the Napoleonic Wars, this is a stirring tale of treason and romance.