James,
my heartfelt condolences...I know how you feel: there is a big, gaping void..
I lost my Dad in 2000 in much the same way. He got up one morning, collapsed and although the paramedics got him to hospital just about alive he died in theater. It was 6 weeks after my Mum died. Not a good year.
Earlier this year Richard very kindly sent me a file of photos he'd taken of Tarka, the Bronze Plus 8: they were special anyway and now serve as a lasting memory of a great photographer of Morgans and a really nice guy.
May he rest in a peace.
Peter