For George,
343/344 run this route through Ontario
Detroit River Tunnel, CN CASO Sub, CSX Sarnia Sub to Chatham, CN Chatham sub to Glencoe, Paynes Sub Glencoe to St Thomas.
327/328 have this routing
CN Talbot Sub (former London and Port Stanley Railway) to London, CN Dundas Sub London to Bayview, CN Gimsby sub to Buffalo.
Jon
C&O is gone from St Thomas, and CASO is just about a glorified Spur now