Looking for the Signalman on Dvd region 1

A kind hearted and friendly man, out for a country walk, spots the signalman standing by the railway line, in a deep cutting at the mouth of a dark railway tunnel. He hails him and waves, wanting only to be sociable and hoping the signalman will be glad of his company, working as he does in such a dismal and isolated location. The signalman doesn't at first seem to welcome the stranger but gives every indication of unease and suspicion at the sudden greeting. The pleasant manner of the man puts