Letter from [William Henry] White, 8 Victoria Street, Westminster, S. W., to [Alan Archibald] Campbell Swinton [Esquire] Thanking Swinton for sending copies of two photographs, stating that Lady White and his daughter have expressed interest in seeing one of them, and that the 'other group is of great vlaue in itself besides marking a stage in the progress of turbine machinery'. 31 March 1910