Hi It looks as though you had a wonderful holiday. I will keep you posted on the entry to Fulke Grevilles Crypt. The expert who is overseeing this seems to be AWL SAUNDERS,he has written a book The Master of Shakespeare,and has indicated he is a relative of my line of the Grevilles but I cant find him.
By the way Ralph have you ever come across a Carl Greville-Raijmakers or Jean Destanne de Bernis on Lord Grevilles side,possibly cousins that are still alive today and maybe in the UK and the Netherlands. Regards Chris.