Ian, welcome to the Mudcat! I'm sure you'll come back again - and again - and again ... like most of us.
Sorry to disappoint you, but you're not (yet) no 51 - that number is about recordings. The song must have been sung by thousands in concerts and sessions!
Also, if you like Eric Bogle's song, better get used to calling it 'No Man's Land' - which is what Eric calls it. From what I hear he doesn't take kindly to the title the Fureys invented :-)!
See ya!