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John H. Wilson and Company aka J. H. Wilson and Co of Dock Road, Seacombe, Birkenhead, and Bankhall Engine Works Sandhills, Liverpool.
of 15 Victoria Street, Westminster - see John Wilson and Co (of Westminster)
1860 Company established by John H. Wilson
1869 Improved Ships' Closet.
1869 Bought the Mackay Gun and advertised it for sale (see advert)
1872 Patent plug valve for steam and water (see advert)
1870s Making the Selden steam pump under licence 
1875 Built a locomotive for the Welsh Slate Company at Blaenau Ffestiniog.
1875 J. H. Wilson and Co briefly referred to in 'The Engineer' in connection with Selden steam pumps, which they made under licence
1876 "NOTICE is hereby given, that the Partnership lately subsisting between us the undersigned, at Liverpool, in the county of Lancaster, as Engineers, Brassfounders, Ships' Ironmongers, &c., under the style or firm of John H. Wilson and Co., was dissolved, by mutual consent, on the 30th day of June, 1876."
1879 Crane for Albert Dock, Tanjong Pagar Dock Company, Singapore. Now preserved on public display near ferry terminal ('Harbour Front').
1891 Of Bank Hall Engine Works. For description of works see 1891 The Practical Engineer
1892 Incorporated as a limited company.
1894 Locomotive Crane, Manchester Ship Canal ('of Liverpool'). 
Manchester Ship Canal - Wilson were a major supplier to these works - either directly or to involved contractors during the construction phase; and to the organisation as a port authority. Note the typical MSC spark arresting bonnets on the chimney.
1903 of 15, Victoria-street, Westminster, and Liverpool. Issued a catalogue No. 52b showing by means of photographic illustrations the many types of cranes made by the company.
1905 Advert for steam winches, windlasses, deck cranes, donkey pumps etc. (of 150 Sandhills, Liverpool) 
1911 7-ton floating jib crane for Spain. 
1914 Engineers and ironfounders. Specialities: steam and electrical cranes, excavators, windlasses, capstans, winches, concrete mixers, pumps and boilers. Directors: C. Q. Henriques and Samuel Porter. Employees 500. 
1918 Large steam excavator (face shovel) described and illustrated in 'Engineering'. Weight 90 tons. Bucket capacity 1.5 cu. yd. Lattice jib 75 ft long.
1919 Locomotive cranes. 
A crane originally made for Russia (export stopped because of the revolution) was regauged and diverted to the Inland Waterways Transport section of the War Department; then shipped to Kantara Workshops on the Sinai Military Railway and finally into Palestine Railway's stock. 
1920 January. Issued leaflets on electrically driven cargo winches. 
1920 Produced a travelling gantry crane for dockyard use. 
1928 “Buildings plant and machinery, and business” advertised for sale.