The Everingham Family tree was researched and published in a book called Cornstalks by Valerie Ross. I'm not sure how far it goes up to as it was revised but the copy my parents had did not record my brother and I born in 78 and 76 but does record my older cousins and my parents marriage. There is also 2 other books....A first fleeter and his Times and Hawkesbury Story and also one containing letters written by Matthew. He is also mentioned in another book on the history of the Hawkesbury and within the Windsor and Richmond Gazette archives. There is also a big everingham family group you can join. Matthew's parentage remains unknown as fair as I am aware, and despite many claims, there is nothing to confirm (or deny) that he was the illegetimate son of Lord Everingham.