18 JUNE 1994, Page 53

No. 1837: The Herr Doktor

I read in Pepys's Diary (14 March 1662): `In the afternoon come the German Dr Knuffler, to discourse with us about his engine to blow up ships.' What device this was we never learn. You are invited to complete the entry (maximum 150 words) in Pepys's style, but using modern spelling. Entries to 'Competition No. 1837' by 30 June.