Oliver Wendell Holmes, Jr., Hart v. B. F. Keith Vaudeville Exchange…
“ It is alleged that a part of the defendants' business is making contracts that call on performers to travel between the States and from abroad and in connection therewith require the transportation of large quantities of scenery, costumes and animals. Some or many of these contracts are for the transportation of vaudeville acts, including performers, scenery, music, costumes and whatever constitutes the act, so that it is said that there is a constant stream of this so-called commerce from State to State. ”
