Letter from [Alan Archibald Campbell] Swinton, to The Editor of Engineering Writing in personal capacity in relation to Mr. Lane Fox Pitt's claims not receiving justice, pointing out he agrees with Mr. Swinburne that Swan anticipated Edison in his invention of the carbon electric lamp and as Swinburne himself admits in the note added, Lane Fox Pitt anticipated both of these inventors in a very much more fundamental patent which he took out for general electricity supply at constant potential, with lamps, dynamos and batteries all in parallel. Comments that both the Swan carbon lamp and the Edison carbon lamp are now obsolete, but Mr. Lane Fox Pitt's system of distribution still prevails. 29 April 1929