Thomas' grandson Richard Collingbourne, of Bedewynde (Great Bedwyn), was Clerk of the Peace in Wiltshire in 1390, Member of Parliament for Marlborough in 1402 and Collector of Taxes in 1413 and 1417.
In the 1470s, he was commissioner in the enquiry of farms for land grants and money in Wiltshire and involved in actions against trespasses and debts, mostly against defendants from Kent, which suggests that he had acquired property in that county as well.
In 1475 he was named as one who would "enquire into certain treasons, Lolardries, heresies and errors" in Dorset and Wiltshire, in a list that also included King Edward's brothers, the Dukes of Clarence and Gloucester.
After the death of Edward IV in April 1483, he appointed to a Commission "to assess certain subsidies granted to the late King by the commons of the realm" and, in July, once more Commissioner of Peace.
Kendall argued both the Marquess of Dorset's joining of Henry Tudor and negotiations with French ambassadors occurred only in 1484, whereas the mentioning of Brittany and Poole was not conclusive evidence.
Robert Fabyan's chronicle, published in 1516, first relate that in July 1484, Collingbourne pinned the following lampoon to the door of St. Paul's Cathedral: The Catte, the Ratte and Lovell our dogge rulyth all Englande under a hogge.
Furthermore, in a letter of 3 June 1484, by King Richard asked his mother Cecily Neville, Duchess of York that "my lord Chamberlain ... be your officer in Wiltshire in such as Colyngbourne had".
[3] If his post was eventually filled by the Lord Chamberlain, Francis Viscount Lovell, this would further explain Collingbourne's ire against Richard's closest associate.
[2] A story by Tudor historian John Stow recounts his end: "After having been hanged, he was cut down immediately and his entrails were then extracted and thrown into the fire, and all this was so speedily done that when the executioners pulled out his heart he spoke and said, 'Oh Lord Jesus, yet more trouble!