at 9 Arthur Street West, London Bridge (1862) and Lombard Street, Southwark, London (1876), business established by Perceval Moses Parsons, the inventor and patentee of Manganese Bronze
1862 Advert: 'Parsons' White Brass,
FOR THE BEARINGS OF RAILWAY CARRIAGES, ENGINES, AND ALL KINDS OF MACHINERY.
ATTENTION is directed to the large saving to be effected by the use of this alloy. The price is not more than two-thirds that of gun metal, whilst its durability is twelve times as great. This has been fully proved by its working on the Great Northern Railway, where bearings made of the White Brass only lost on the average 2 1/4oz. the pair, after running 19,800 miles, while gun metal bearings, running in the same carriages, at the same time, and under the same conditions, lost 1lb. 12 2/3ozs. Samples of this metal may be seen in the International Exhibition (Western Annexe) near the Locomotive Engines. P. M. PARSONS, No. 9, Arthur-street West, London-Bridge, E.C.'[1]
1876 Patent on the manufacture of Manganese Bronze[2].
1879 Business was already making profit from the sale of ingots[3].
1879 Manganese bronze torpedo boat arrived at Portsmouth - it had been built by Maudslay, Sons and Field on the Thames[4].
1879 Letter from Mr P. M. Parsons concerning the manganese bronze torpedo boat which had been reported arriving at Portsmouth from The Thames; the plates were thinner than reported in that article and vibration only occurred at certain engine speeds[5]
1880 Patent for improvement in casting copper, bronze, brass under pressure[6].
1882 Manganese Bronze and Brass Co was registered on 28 June, to acquire the business of P. M. Parsons [7] for manufacturing manganese bronze and white brass; temporary offices at 3 Walbrook, London EC[8].