Notes of Edith Marian Miles Todd: "William Billing was a widower with seven children: Charles 1818, Emma Francis 1820, Nathaniel 1820, Sophia 1822, William 1823, Samuel 1825, James 1826. Also had William born 1817 and died 6 days old. His first wife was his cousin Mary Billing, daughter of Richard. They lived in Brightwell, Oxford when first married as children up to 1822 recorded there. Lived on what was called "The farm" in Brightwell according to Mr. Hilgrom Cox, recorder at Brightwell, and at Bledlow lived in a lovely old house called the Manor House which belonged to the Lord of --. Eliza Delahoy went to Bledlow as a young lady, governess to his children about 1829. William Billing was injured in a fall from his horse and ordered on a sea voyage by his physician and died at sea. His sons James and Samuel were with him and were evidently taken by passengers on ship. William's son Charles was in Canada wither they were bound. The family of Nathaniel Billing (son of William) in Melbourne, Australia, have a bible (Ed 1682 my F. entry in different hand writing) with entries showing death dates of brothers and sisters. Some of the children were taken by Richard Billing (brother of Mary) of Reading.".
1834 "Take Notice, that William Billing, of Bledlow, in the county of Bucks, farmer, hath by indenture, dated the 14th day of August last past, assigned all his personal estate and Effects to Richard Billing, of Reading, in the county of Berks, builder, and William Fryday, of Bledlow, aforesaid, grocer, upon trust, for the Benefit of all the Creditors of the said William Billing; and that the said indenture was executed by the said William Billing on the 14th day of the said month of August in the presence of, and is attested by, Jacob Vines, of Reading aforesaid, solicitor; and by the said William Fryday on the 28th day of the same month of August, in the presence of, and is attested by, John Nash, of High Wycombe, in the said county of Bucks, solicitor; and the said indenture of assignment is now lying at the office of Mr. Vernon, auctioneer, High Wycombe aforesaid, for the signatures of the creditors of the said William Billing." 
Mary Billing was a cousin of her husband William Billing
Transcriptions of the parish records of Bledlow, Buckinghamshire [http://lanchbury.id.au/genealogy/bledlow1500.html]
1823 Born 18 Oct bapt 19 Nov William son of William & Mary Billing Bledlow Farmer
1825 Born 26 Jan bapt 2 Mar Samuel son of William & Mary Billing Bledlow Farmer
1826 Born 8 Aug bapt 18 Sep James son of William & Mary Billing Bledlow Farmer
1829 Burial Mary Billing Bledlow 5 Nov age 38
 Newspaper, The Times (London), Sep 11, 1834, P. 1, Issue 15580, Col B.