That's a nice thought VictorGolf but she'd stopped working by the time I was born in 1953... And she was working at the Isle of Man end of the service. But I should be visiting Duxford in a couple of weeks time so I will take a nostalgic look at your Rapide if it is there. I hadn't realised it's Manx Airlines connection.
Paxboy I am travelling until Monday next week, but I will consult "The Book" when I get back; I know there is a reference to seaplane operations but I can't remember specifics.