'They're all sea ports. The writer was on a ship when
he wrote the letters,' I replied. I was pleased with my
answer.
'Very good, Watson,' said Holmes. 'Somebody sent
some pips from India, and arrived seven weeks later to
kill Uncle Elias. Then he sent some pips from Scotland
and arrived three days later to kill John's father. Do
you see why I'm worried now? He has sent pips to