Oliver Wendell Holmes, Jr., Watters v. People of Michigan…
“ The ordinance makes it unlawful to engage in peddling any goods or to canvass from house to house for the sale of property on subscription without a license, which may be had on payment of specified fees. The plaintiff in error agrues that the application of this law should be determined by the general course of business, not by an isolated transaction, and the argument has force. It depends, however, on the construction of the ordinance, and as the State Court has construed it to apply to and forbid the act proved, the judgment must be affirmed. ”
