Rachel Waller was the mother of my father's father, John de Salis. She was descended directly from Edmund Waller. She mentioned it in one of the books which she privately had published - Notes On Past Days. The other poet I havent heard of, Im afraid. A person with good information and lots of ducuments (I believe) is Clive de Salis, the secretary of the family association, who lives in Solihull I believe.