Tonight an American Attorney takes up the brief on behalf of Thomas Jefferson , one-time President of the USA, which is just one of the interesting specialised subjects in tonight's Mastermird heat. The contenders are:CHRISTINE SHAW, teacher, English history 1603-1660MICHAEL DIXON, Post Office manager, Life and works of Sergei Prokofiev JOHN GEORGE, Herald, The Papal Conclaves 1799-1878 ANDREW REISH, attorney, Thomas Jefferson