Montmorency plays an important role in the story-line of "Three men in a boat". He is gifted with a sharp understanding of men, matters and situations which is rarely found in the breed of animals like him. But Montmorency is a fox-terrier. He can be cautious and practical. Montmorency has the blood of fox-terrier in his veins. He never leaves a dog unchallenged. He finds Oxford, the most ideal and suitable place, a 'heaven' for him.