Well thanks for the speedy reply shipmates .I knew there was something nautical about the tune . Captain Pugwash of course! I've been working through the tunes in O'Neils on a guitar - I have to leave out a lot of the twirls and frills and whatever and sort of take guesses at what the tunes are . Sometimes they even vaguely turn out to correspond to how they sound when played by people who know what they're doing .