Langston, Towgood, Cazalet & Co., London
Founded as Langston, Polhill, Towgood & Amory in 1777. 29 St.Clements Lane, London.
Langstons, Towgood & Amory by 1792.
Langston, Towgood & Cazalet by 1801
Langston, Towgood, Cazalet & Co. by 1802
Amalgamated with Rogers, Olding & Rogers in 1811 to become Rogers, Towgood & Co. (see entry under this name)