From: Newark Street Guide 1872

The Clinton Line has two classes of cars passing over the same route. The smaller cars drawn by one horse only, run from Market Street Depot to Chadwick Avenue and the two horse cars pass on to Irvington. The cars and signal lights are both yellow and the route is via Market and Broad Streets, and Clinton Avenue, passing Elizabeth Avenue, Johnson Avenue and a two mile run to Chadwick Avenue in the one case, and continuing on past Clinton Place, and Union Avenue in the other. The Chadwick Avenue cars make as many as 81 trips a day, leaving every ten or twelve minutes from 6:38 AM to 10:15 PM. Those running to Irvington make 21 trips, the fist at 7:03 AM and the last at 10:15 PM.