Character Mr. White Mason Average age: 71 years Wikipedia: Mr. White Mason (link not verified) 1914 ◢ Appeared once in 'Canon'. Sep 1914:'The Valley of Fear' 1997 ▷ Played by Timothy Bateson twice on Radio in 'Merrison canon radio dramas'. 23 Mar 1997:'The Scowrers' 30 Mar 1997:'The Tragedy of Birlstone'