Peter Pilkington, Ltd of Caxton House, Westminster, London SW, and Dowry Iron Works, Bamber Bridge, Accrington, Lancashire.
1850 Company established. See Peter Pilkington (1814-1879)
1860 Dissolution of the Copartnership between Peter Pilkington and Thomas Entwisle, carrying on business at Dowry Foundry, within Accrington, in the county of Lancaster, as Iron Founders, Millwrights, and Engineers, under the style or firm of Messrs. Pilkington and Entwisle' all debts due to and owing by the said copartnership will be received and paid by the said Peter Pilkington, by whom the business of such copartnership will in future be carried on.
1895 'NOTICE is hereby given that the Partnership heretofore subsisting between us the undersigned James Pilkington and William Renard Pilkington carrying on business as Engineers and Ironfouhders at Dowry Iron Works Accrington in the county of Lancaster under the style or firm of Peter Pilkington has been dissolved by mutual consent as and from the 18th day of September 1895. All debts due to and owing by the said late firm will be received and paid by the said William Renard Pilkington who will henceforth carry on the said business at the same address on his own account under the same style or firm.— Dated this 18th day of September 1895. JAMES PILKINGTON. WILLIAM RENARD PILKINGTON'
1897 Exhibited a steam hammer
1904 Incorporated as a Limited Company.
c.1906 Critchley-Norris Motor Co was set up as a branch of the company, making bus chassis.
1914 Manufacturers of Pneumatic Machinery. Specialities: Pneumatic Hammers, Pneumatic Drills, Air Compressors etc. 
1930 Peter Pilkington (1921) Ltd was in liquidation