of 22 St Ann's Square, Manchester
c.1864 National Boiler Insurance Co established
1866 Designation of patent from John Smith to National Boiler
1877 Plug patent: Mr Hiller
1882 Advert: Henry Hiller was Chief Engineer and Manager; advertised patent fusible plug.
1883/4 Designation of patent re invention for improvement of fusible plugs; from John Kenyon to National Boiler
1894 Advert: Name had become National Boiler and General Insurance Company .