He co-founded the Apollinaris mineral water company, and was the proprietor of the London evening newspaper St James's Gazette.
[3][n 1] He started on a commercial career which took him as a comparatively young man to Glasgow, where he worked as a trader in the German-owned chemical trading firm of Leisler, Bock & Co. which specialised in potash, iodine and soap.
One of the later directors of Apollinaris was George Alexander 'Pop' Hill, Mission chief of Special Operation Executive in Moscow during WWII.
[12] George Smith, Steinkopff's business partner in Apollinaris, was also the owner of the Pall Mall Gazette, a 'Jingoist' weekly journal.
The editor, Frederick Greenwood, left with the entire editorial staff to found the St James's Gazette, backed by Henry Hucks Gibbs, 1st Baron Aldenham.
[19][20] The latter was not at all impressed with Steinkopff and his wealth: returning from Cairo after his retirement in December 1892, Peto reflected in his travel diary: After his daughter Margaret's death, the art treasures in the house were sold at auction by Christie's, 22-24 May 1935; these included paintings, furniture, glass, porcelain, bronze sculptures, and silver.
Jack Hayward financed the salvage and repatriation of the SS Great Britain from the Falkland Islands to her final resting place in Bristol.
[25] The greater part of his estate was left in trust to his daughter Mary Margaret Stewart-Mackenzie, "for such charitable institutions as she may appoint".
[31] When she died, she left £1,250,000 in her will,[32] with a list of charitable gifts which filled two and a half closely typed pages, amounting to £780,000 (about $4 million).
[34] Stewart-Mackenzie's brother-in-law was William Evans-Gordon, MP for Stepney, who married Mackenzie's sister Julia in 1892.
[35] Evans-Gordon was instrumental in the passing of the Aliens Act 1905, which limited the number of people allowed to enter the UK.
[36] Edward August Carl Friedrich Steinkopff is not to be confused with Karl Friederich Adolph Steinkopf (1773-1859), a Lutheran minister known in England as the Rev.