Louis Brandeis, St. Louis Southwestern Railway Company v…
“ There is no claim of an express contract to pay additional compensation; nor is there any basis for a claim on a contract implied in fact. The petition alleges that the parcel post matter was radically different in character from the ordinary mails as constituted before January 1, 1913. It may be, that claimant might legally have refused, for this reason, to carry the parcel post mail under then existing contracts; even if additional compensation had been offered. ”
