Hi, I am Ian Dewsnap, Leslie's son. I posted on this site a couple of days ago, but cannot locate the entry, so maybe it was lost somewhere.
I am presently visting the UK at my parents house, but flying back to Germany in a couple of hours, where we presently live.
I am not going to spend long posting since this also might get lost. We spoke to your grandfather on Friday night having found your entry on here. We will be happy to supply more information if you wish to contact my father.