Anthony Heal asks us to correct an error that crept into his articles on the V12 aero-engined Sunbeam racing cars. The 350 hp Sunbeam had wooden, not steel artillery wheels as first run, as Brian Morgan points out. These were soon changed, as Heal said, for Rudge-Whitworth wire-spoked wheels; he makes the point that Coatalen having used Sankey steel artillery wheels for the 1912 and 1913 racing cars, it is odd that he allowed wooden wheels to be fitted to such a fast and large car as the V12 Sunbeam in 1920. — W . B.