Letter from [Percy Fitzpatrick] Rowell, Secretary, The Institution of Electrical Engineers, Savoy Place, Victoria Embankment, London, W. C. 2., to [Alan Archibald] Campbell Swinton, F. R. S., 40 Chester Square, S. W. 1. Clarifies erroneous references made by Sir Charles Parsons, who referred to Mr E. Cameron Mawson's letter when in fact he meant to say Mr John C. Gibson. 14 February 1929