In 1876, Harry Stanwix and Robert Gregson were manufacturing a patent mortiser under the name H. Stanwix & Co. In July of that year the partnership split up and manufacture continued under the name of Robert Gregson. By the beginning of 1877 Mr. Stanwix went bankrupt and he reportedly died sometime that same year.

Information Sources

• 1876-07-25 London Gazette.

  Notice is hereby given, that the Partnership heretofore subsisting between us the undersigned, Harry Stanwix and Robert Gregson, carrying on business as Machine Makers, at the Sackville Works, Sackville-street, in Leeds, in the county of Yrok, under the style of H. Stanwix and Company, has been dissolved by mutual consent, as and from the 30th day of June now last past. All moneys due to the said firm and all moneys due from the firm will be received and paid by the said Robert Gregson, by whom the future be carried on.—Dated the 19th day of July, 1876.
  Harry Stanwix
  Robert Gregson.

• 1877-01-16 London Gazette.

  The Bankruptcy Act, 1869. In the County Court of Yorkshire, holden at Leeds. In the Matter of Proceedings for Liquidation by Arrangement or Composition with Creditors, instituted by Harry Stanwix, of Moor Foundry, Holbeck Moor, Leeds, in the county of York, Engineer, lately carrying on business at Sackville Works, Sheepscar, in Leeds aforesaid, in copartnership with Robert Gregson, under the style of H. Stanwix and Co.
  

  Notice is hereby given, that a First General Meeting of the creditors of the above-named person has been summoned to be held at the offices of William Henry Hewson, Solicitor, 1, East-parade, Leeds, on the 29th day of January, 1877, at three o'clock in the afternoon precisely.—Dated this 13th day of January, 1877.
  Will. H. HEWSON, Solicitor for the said Debtor.

• According to a genealogy site, Stanwix died in 1877.