Caption: After spending at least the last half hour sweeping out the Walker's Siding/South track crossovers and derail (and tying up almost every crossing on the Dundas sub in London), a rather long CN 509 slowly pulls down the west lead into Racecourse yard while a very cold CN 4707-1412 try to keep warm on their day off. In the distance, CN 439 lifts CN 4116 off the shop track for transport to Chatham.