[J. Thomas Scharf (1886)] six feet above mean tide; passes along the valley of the Croton to near its mouth, and thence into the valley of the Hudson; goes through the villages of Sing Sing, Tarry town, Dobbs Ferry, Hastings and Yonkers; at the last leaves the bank of the Hudson and crosses the valley of Saw-Mill River and Tibbets' Brook; thence runs along the side of the ridge that bounds the southerly side of Tibbets' Brook Valley to within three and a half miles of the Harlem River, where the high grounds of the Hudson fall away, and passes, in consequence, over the summit lying be-tween the Hudson and East Rivers to the Harlem and the great High Bridge. Over the bridge, which crosses the Harlem Valley and the river, the water thus brought is conveyed in immense iron pipes, so huge that a very tall man can stand erect within them. Then the aqueduct of masonry is resumed and continued a couple of miles to the termination of the high ground on the north side of Manhattan Valley, HISTORY OF WESTCHESTER COUNTY. where it again gives place to iron pipes which de-scend into the bottom of the valley, a hundred and two feet below the aqueduct level, and rise to the proper point on the opposite side and extend to the receiving reservoirs in Central Park. The Sing Sing Kill, where it crosses the line of the aqueduct, runs in a deep and narrow gulf, the bottom of which is sixty-three feet below the grade line. The aqueduct bridge, which covers the gulf, is immense.