Three limericks.

Here are three limericks, which belong together. The second would be bizarre without the first: The third is parasitic on the other two, and is one of the most unusual limericks I know.

1. There was a young lady from Crewe,
   Whose limericks stopped at line 2.
   
   
2. There was a young man from Verdun,
   
   
3.