"Before noon on the nineteenth of April, 1775, an express came to town, shouting, as he passed through the street at full speed, 'To arms! to arms!--the war's begun.' His white horse, bloody with spurring, and dripping with sweat, fell exhausted by the church. Another was instantly procured, and the tidings went on. The bell rang out the alarm, cannon were fired, and messengers were sent to every part of the town to collect the soldiery. As the news spread, the implements of husbandry were thrown by in the field; and the citizens left their homes, with no longer delay than to seize their arms. In a short time, the 'minute-men' were paraded on the green, under Captain Timothy Bigelow. After fervent prayer by Rev. Mr. Maccarty, they took up their line of march to the scene of conflict." Such was Bigelow's zeal and ardor in the great cause of the times, that he appeared on the following morning, at the head of his "minute-men," in the square at Watertown, having marched them there, a distance of over thirty miles, during that one short night. On the nineteenth of April, 1861, the Bigelow Monument was dedicated. At the very hour of the consecration exercises, the Massachusetts Sixth Regiment was engaged in its memorable struggle and triumphant passage through the blockaded streets of Baltimore at the beginning of the Civil War. [Illustration: A NEW ENGLAND PAPER MILL.] Along the west side of the Old Common runs Main street, just out of which, in Pearl street, is the Post Office. I have seen a curious computation with regard to that Post Office development, which aptly illustrates the rapid growth of Worcester. The number of letters sent out in 1809 was about 4,400. The number of letters taken out fifty years later was 523,808. Main street reaches Lincoln Square, where stand the two court houses. The old one has been removed a few feet, and refitted. In it the criminal courts are held; there too are the offices of the court of probate and insolvency. The New Court House was built in 1845 of Quincy granite, at a cost of about one hundred thousand dollars. In it the civil terms of the courts are held, with numerous ante-rooms for the jurors and for consultation. The lower floor is occupied by the office of the register of deeds, and by the clerk's and treasurer's offices. Close neighbor to the court houses is the building containing the rooms of the American Antiquarian Society, one of the leading learned bodies of our country. It was founded in 1812. It possesses a very valuable library, especially rich on subjects of local interest to Americans. The newspapers filed here include over four thousand volumes, beginning with the Boston _News Letter_ of 1804, and closing with the great journals of to-day. This same society also possesses a very interesting collection of pre-historic American relics.