W. G. Dunn and Co Soap manufacturers of Croydon.
1887 William George Dunn returns to England from Canada and started business as a baking powder manufacturer on Katharine Street, Croydon.
1887 W. G. Dunn applied to register a trademark for 'Dunn's Fruit Salt Baking Powder' on 29th June, but strong objection came from James Crossley Eno who ten years prior to this had been granted a trademark for the term "fruit salt". 
The debate lasted 3 years. Eno objected that Dunn's proposal was an infringement of Eno's own trademark and that the use of this term was "calculated to deceive" the public into seeing a connection between Dunn's baking powder and the established Eno's Fruit Salt drink. William fails to obtain the trademark.
1904 Moved to London Road.
1906 On the 13th August William died.
1912 Onwards. Business known as Dunn Brothers, Custard Powder Manufacturers of Tanworth Road.