Debate whether or not it is fair the sailor received “a large sum” for the orangutan.

A large sum would be appropriate, as the oragutan would be considered an exotic animal.

Sailors travel to strange, faraway places where such things as orangutans can be got. If I am right….
“Think for a moment! The sailor will say to himself: ‘The animal is valuable. Why shouldn’t I go and get it? The police do not know the animal killed two women. And clearly somebody knows I am in Paris. If I do not go to get the animal, they will ask why. I don’t want anyone to start asking questions about the animal. So I will go and get the orangutan and keep it where no one will see it, until this trouble has passed.’ This, I believe, is how the sailor will think.