by John Marshall Harlan, Barney v. Latham — Opinion of the Court
“ It was often convenient to embrace in one suit all the controversies which were so far connected by their circumstances as to make all who sue, or are sued, proper, though not indispensable parties. Rather than split up such a suit between courts of different jurisdictions, Congress determined that the removal of the separable controversy to which the judicial power of the United States was, by the Constitution, expressly extended, should operate to transfer the whole suit to the Federal court. ”
