Complex sentence: It is not possible to source any direct criticism of any named railway in "Punch", and the West London Extension Railway had already been built at the date to which the anecdote refers, and North End Road is somewhat to the west of the line.
Split into simpler sentences: It is not possible to source any direct criticism of any named railway in "Punch". The West London Extension Railway had been built by the date to which the anecdote refers, and North End Road is somewhat to the west of the line.