Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,450 pages of information and 233,880 images on early companies, their products and the people who designed and built them.
John H. Ladd
c1843 Born USA
1888 The Boomer portable baling press illustrated. 
1911 Living at 5 St James Road, Surbiton: John H. Ladd (age 68 born USA), Director and Manager of Incandescent Gas Mantles. With his wife Anna F. Ladd (age 69 born USA). States they had two chilfren and have been married for 42 years.