Letter from [Alan Archibald Campbell] Swinton, to P. F. Rowell [Esquire] Responding to a previous letter in relation to finding an expert for cleaning and restoring pictures, recommending Mr. W. A. Holder. Hopes he can get hold of him to assess whether he can do anything. Comments he knows nothing of Sir Robert Witt bur thinks he may be an expert adviser and not an actual restorer. 18 January 1929