Osborn’s brother-in-law, William Fawcett, went into partnership with him in 1867 and new premises, in the
Wicker area of the city, were bought the following year, these taking the name
Clyde Steel & Iron Works, this becoming their main base of operations, the large Head Office of the company fronting the Wicker (these buildings still stand and house retail businesses at street level and, above, the Sheffield and District African-Caribbean Community Association). In 1870 Osborn met
Robert Forester Mushet, an iron master working in the
Forest of Dean where he was producing a new alloy steel, considered far superior to crucible steel. Osborn bought the sole rights to manufacture ''
'R. Mushet's Special Steel''' (R.M.S) and Mushet's two sons, Henry and Edward, moved up to Sheffield to oversee its manufacture. Business was booming with orders created by the Franco-Prussian War and the development of the railways. == The fall and rise of the company ==