Another intriguing part to the story. I was wondering about the genetic Pituitary condition being an explanation. I can see how it could explain small numbers and perhaps even family clusters, but thousands is probably stretching it. This link traces the genetic trail in Ireland (of Giant's Causeway fame ), so it might be worth considering. http://www.fipapatients.org/irishgiants/
Great to see you may have a sponsored travel offer too Gulliver ;)