Joseph Warden and Sons
of Railway Ironworks, Birmingham.
London Office - 27 Great George Street, Westminster.
Presumably connected with the business of Joseph Warden, Junior
1849 Directory: Listed as nail manufacturers 
1859 Advert - Manufacturers of Merchant Bars, Angle and T Irons, Boiler Plates, Corrugated and Galvanised Sheets. Also Screws Bolts and Nuts, Boiler Rivets, Hoisting Crabs, Screw Jacks, Chains ect.
Sources of Information
- History and Directory of Birmingham, 1849: Nail Manufacturers
- The Engineer 1859