Hello Hinrik,
I was searching for information about Mark J Mourne and hit on this posting.
Maj. Mourne was my Great Uncle, my Mothers uncle.
I am interested in seeing what documents you have that contain his signature, as well as any other information about his plane or mission.
We knew that he had crashed in the islands during the war but he never shared much about the whole experience.
He made it back to the states and lived in California until he died in ~1970 or 71.
I only remember meeting him once so any additional info I can find on him and his service would be appreciated.
Cole