Vaughan was born in Machynlleth, Montgomeryshire some time around 1615. He died in London in or before 1672. He was probably christened Rhys Vaughan, but styled himself ‘Rice’ in his published works. He entered Gray's Inn in 1638, was called to the bar at an unknown date, and practised law for the remainder of his career. He wrote two Short works on law, A Plea for the Common Laws of England (1651), on the English legal system, and Practica Walliae (1672), a guide for attorneys in Welsh courts, which was published posthumously. Also published after his death was A Discourse of Coin and Coinage (1675), from a manuscript found in his papers by a cousin, Henry Vaughan.
From The Biographical Dictionary of British Economists in Oxford Reference.