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c1832 Born the son of Augustus Siebe
1851 Living at 5 Denmark Street, St. Giles, Mddx: Augustus Siebe (age 60 born Prussia), Engineer. With his wife Susan Siebe (age 55 born Shirwell, Devon) and their children Frederick Siebe (age 27 born London), Engineer (Visiting); Daniel Siebe (age 22 born London), Engineer (Visiting); Henry Siebe (age 19 born London), Engineer; and Mary Siebe (age 17 born London). Also his sister-in-law Sarah Gliddon (age 57 born Shirwell, Devon) and two visitors. Two servants.
1861 Living at 2 Leith Street, St. Anne Soho, Mddx: Henry Siebe (age 29 born St. Giles, Mddx), Engineer (Machinery). With his wife Elizabeth Siebe (age 24 born Paris). Also a boarder Emille Glamatski (age 25 born Honigsberg, Prussia). 
1869 Henry Herepath Siebe, of Aspen Cottage, Mortlake, trading in copartnership with Alfred Concanen and Thomas Wailes (sic) Lee, under the style or firm of Concanen, Lee, and Siebe, as Lithographers and Colour Printers, and part of the time trading as Siebe and Barnett (sic), having been adjudged bankrupt under a Petition for adjudication of Bankruptcy, filed in Her Majesty's Court of Bankruptcy in London, on the 30th day of November, 1869
1870 of No. 50, Manor-street, Clapham, trading in copartnership with Alfred Concanen and Thomas Miles Lee, under the style or firm of Concanen, Lee, and Siebe, as Lithographic and Color Printers, and part of the time trading as Siebe and Burnett, discharged from bankruptcy
1871 Patent to Henry Herapath Siebe and William Gorman, both of Denmark-street, Soho, Submarine Engineers, and Thomas Christy, Junior, of Fenchurch-street, Contractor, for the invention of "improvements in the construction of vessels for raising sunken ships or other bodies."
1878 retired from Siebe and Gorman