Jefferson's ringer watched over the upper third and fourth districts. The next tower was Twenty-third Street, near First Avenue, an open affair of iron, like that at McDougal, and here the guardian looked out over all the lower first and upper fifth districts, as well as having an eye on the northeastern part of the fourth. Then came Thirty-second Street, far over near Ninth Avenue, another open cage; and in the cozy, stove-warmed roost at the top of each, snugly closed against wind and weather, day and night, as has been said, and only one man at a time, the ringer kept his ceaseless vigil. It was his duty to be ever on the alert, ever moving about and spying over the city. If an unusual smoke or blaze manifested itself anywhere, he would at once unsling his spy-glass and examine it. If it lay long blocks or miles away and closer to some other tower, the unwritten law or etiquette of the craft demanded that he should touch the key of his telegraph. This instantly sounded the little bell in the other towers on his circuit, and called upon his fellows to look about them. At no time could he sit and read. He must pace about the narrow confines of his rounded den, or on the encircling gallery outside, and watch, watch, watch. Whenever he discovered a fire, the first thing was to let down his lever and strike one round of the district in which it lay,--fast if the fire was near, slow if at a distance. This was all the neighboring companies had to judge by, as the first arrivals at the engine-house, or the loungers generally sitting about the stove back of the apparatus, or the bunkers who slept there at night, sprang for their fire-caps, raced for the trumpet that stood on the floor at the end of the tongue, threw open their doors, manned the drag-rope, and "rolled" for the street. No company could speed far on its route before meeting some runner or partisan who could tell the exact or approximate location of the fire. The first round from the tower would start every machine in its neighborhood. Then the ringer would spring to his telegraph and rapidly signal to the City Hall two rounds of the district, then add the number of his tower. Then back he would go to his lever and bang another round. If the fire was trivial four rounds would suffice; if a great conflagration ensued he would keep on ringing for half an hour, and if it proved so great that the chief engineer deemed it necessary to call out his entire force, word would be sent to the nearest tower, and a general alarm would result,--a continuous tolling until signalled from the City Hall to cease. Well did Pop's boys remember the one general alarm of 1859, when the magnificent Crystal Palace at Sixth Avenue and Forty-second Street went up in smoke; and all in half an hour! And thrilling and interesting it was to the favored few of their number permitted sometimes to stand watch of an evening with the ringer, and to peer down on the gaslights of the bustling streets and over dim roofs