The presiding judge at Burr's trial, not the least of whose achievements was the holding level of the scales of justice on that memorable occasion, was the last of that great school of statesmen who had fought for their country's independence, and who had seen the states united under a common Constitution. John Marshall lived well into the nineteenth century, and his great work was to interpret that Constitution to the country, to give it the meaning which it has for us to-day. Marshall was a Virginian, was just of age at the outbreak of the Revolution, and served in the American army for five years, enlisting as a private and rising to the rank of captain. At the close of the war, he studied law, gained a prominent place in the politics of his state, drew the attention of Washington by his unusual ability, and in 1800 was appointed by him secretary of state. A year later he was made chief justice of the Supreme Court--an appointment little less than inspired in its wisdom. For thirty-four years, John Marshall occupied that exalted position, interpreting to the new country its organic law, and the decisions handed down by him remain the standard authority on constitutional questions. In clearness of thought, breadth of view, and strength of logic they have never been surpassed. His service to his country was of incalculable value, for he built for the national government a firm, foundation which has stood unshaken through the years. * * * * * So we come to a new era in American history--an era marked by unexampled bitterness of feeling and culminating in the great struggle for the preservation of the Union. Across this era, three mighty giants cast their shadows--Henry Clay and Daniel Webster and John C. Calhoun.