This book is divided in two part. A young Irish gentleman of the numerous clan O'Donnells, and a Patrick, hardly a distinction of him until we know him, had bound himself, by purchase of a railway-ticket, to travel direct to the borders of North Wales, on a visit to a notable landowner of those marches, the Squire Adister, whose family-seat was where the hills begin to lift and spy into the heart of black mountains.