He is in the woods near his country house and for the first time since he acquired the property twenty years ago he has dared to take a walk in the surroundings.
A heart attack is the cause and the medical recommendations that he should take plenty of fresh air and walk.
He looks everywhere and does not see any railway line, no doubt it has been a confusion with another sound of the place.
He continues walking and a beep makes him stop again, he is convinced that it is a train, that sound is unmistakable.
Behind him for a few seconds he feels the passage of a vehicle of that type, but before his eyes there are only trees.
When he arrives at his house he makes the comment to the foreman and the latter answers him.
-Every day at this time in that place you hear that sound, we are used to it, apparently a train used to pass by there many years ago.