Felix Frankfurter,
Whitehouse v. Illinois Central Railroad Company…
“ Apart from some lower court's dicta, there is no reason for holding, in the abstract, that any possible award would be rendered void by failure to give notice to an outsider even if related interest that cannot be compulsorily joined as a party to the proceeding. The Board has jurisdiction over the only necessary parties to the proceeding and over the subject matter. If failure to give notice be treated as an error, in an award in favor of Railroad it would constitute at best harmless error which could not be made the basis of challenge by Railroad, Telegraphers or Clerks. ”
