Items

• [Z150D], Letter from South Kensington Museum, Henry George Lyons to Association of Edison Illuminating Companies, Frank Andrew Wardlaw, July 13th, 1922
  1922-07-13
• [Z150F], Letter from South Kensington Museum, Henry George Lyons to Frank Andrew Wardlaw, Association of Edison Illuminating Companies, May 27th, 1924
  1924-05-27
• [Z150J], Letter from South Kensington Museum, Henry George Lyons to Thomas Alva Edison, August 25th, 1925
  1925-08-25
• [Z150K], Letter from South Kensington Museum, Henry George Lyons to Thomas Alva Edison, January 5th, 1926
  1926-01-05