The principle upon which innkeepers are charged by the common law as insurer of the money or personal effects of their guests originated in public policy. It was deemed to be a sound and necessary rule that this class of persons should be subjected to a high degree of responsibility in cases where an extra-ordinary confidence is necessarily reposed in them, and where great temptation to fraud and danger of plunder exists by reason of the peculiar relations of the parties….

Ruggero J. Aldisert, Agatha D. Aldisert, Logic for Lawyers- A Guide …, loc. 625