Apologies, I have come to this conversation rather late. The Vulcan Iron Works was established in 1843 by Fowler and McCollin for the manufacture of marine and land engines and boilers and the premises were extended in 1865. The partnership between William Fowler and William McCollin was dissolved in 1877 and the business passed over to Mssrs Tindall and Co and then Tindall, Earle and Hutchinson until being wound up in 1904. The works was sold in lots. The Hull Daily Mail reports on Nov 29, 1910 that Henry Smith, marine store dealer, of Henry Smith & Co, Vulcan Works, was summoned for failing to keep records of purchases in Hull Police Court. Presumably, said Henry bought one of the lots in 1904 but I don't know whether he occupied a part or whole of the works.
I am a descendant of William McCollin and more can be found here of Fowler & McCollin on my archived website:
https://www.oocities.org/d_mccollin/maleline2.htmlPS. I'd love to see the original of the engraving above. My email can be found on the homepage of the above website.