Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 133,820 pages of information and 211,921 images on early companies, their products and the people who designed and built them.
of Tredagh Cycle and Motor Works, Laurence Gate, Drogheda
1902 June. 'Maker of the Celebrated Tredagh Cycles'. 
1906 July. 'Manufacturers of the Famous Tredagh Cycles and Motors.'
1909 March 'Maker of the Famous Tredagh Cycles'.