Letter from [Alan Archibald Campbell] Swinton, to Percy Dunsheath, C. B. E. Informs that Henley's have sent him a copy of Dunsheath's recent paper on "Points in the Operation of Dielectrics", some of which interested him by recalling his experiments from 1911, repeating with a 10, 000 volt battery current experiments on liquid dielectric motions that had been discovered nearly 100 years ago by the first Lord Armstrong with his hydro-electric machine. Encloses a copy of his own paper [enclosure not present]. 12 April 1928