A southbound Delaware & Hudson train does some work and gets a new crew at the yard in Taylor, Pennsylvania. I’m not sure about the transfer caboose, but the road caboose at the front of the train indicates that this is probably a Potomac Yard train. In this era, trains NE84/87 and RPPY/PYRP had cabooses at each end, eliminating the need for repositioning the caboose when the trains reversed direction in Allentown.