During the summer it is pleasant enough to cross either of the rivers which encircle the island, but in the winter such travelling is very dangerous. Storms of snow, fogs, and floating ice interfere very greatly with the running of the boats, and render accidents imminent. Collisions are frequent during rough or thick weather, and the ice sometimes sweeps the boats for miles out of their course. The East River is always more or less crowded with vessels of all kinds, either in motion or at anchor, and even in fair weather it requires the greatest skill on the part of the pilot to avoid collisions. Tens of thousands of people enter and leave the great city daily by means of the ferries. The country for twenty miles around the city is built up by persons who earn their bread in New York, and morning and evening they pass between their places of business and their homes. You may recognize them as they come into the city in the morning, or as they leave it at the close of the day. Towards five o'clock vast swarms of working-men pour over the river, followed at six and seven by the factory and shop girls, the clerks and salesmen in the retail houses and offices, and from these the newsboys reap a harvest for the two-penny papers. Every one has his newspaper, and all who can find the necessary space on the ferry-boat economize their time by reading the news as they cross the river. Later still come the clerks in the wholesale houses, and later still the great merchants themselves. Between nine and ten the Wall street men put in an appearance, and later yet the great capitalists, residing out of the city, begin to show themselves. From eight o'clock the great dailies are in demand, and the newsboys have scarcely a call for the cheap papers. Towards noon the idlers and ladies bent on shopping expeditions cross over, and for a few hours the ferries are comparatively dull. Towards four o'clock in the afternoon, however, the tide flows back again, but in reverse order. The richest come first, for their working hours are short, and the poorest extend the crowd into the hours of darkness. Night brings another flow and ebb of pleasure-seekers, theatre-goers, etc., so that the midnight boats go almost as full as those of the early evening. Then a few stragglers avail themselves of the boats that ply between midnight and morning. They are mostly journalists, actors, or printers employed in the newspaper offices.