As to what it was he feared, we can only deduce that by considering the formidable letters which were received by himself and his successors.

Did you remark the postmarks of those letters ?" "The first was from Pondicherry, the second from Dundee, and the third from London." "From East London.

What do you deduce from that ?" "They are all seaports.

That the writer was on board of a ship." "Excellent.

We have already a clue.