From October 1906 to January 1909 eighteen of the Duke Class were converted to Bulldogs by the fitting of No. 2 boilers .
In March 1906 , Bulldog was rebuilt with the same type of boiler , and the class now became known as the Bulldog Class .
From October 1906 to January 1909 eighteen of the Duke Class were converted to Bulldog Class by the fitting of No. 2 boilers .
In March 1906 , Bulldog was rebuilt with the same type of boiler , and the class now became known as the Bulldog Class .