The people behind the workshop · 1788—1904
The Siebe & Gorman family
A father, his son, his daughter and his son-in-law: family ties shaped the nineteenth-century diving works.
No verified, reproducible likenesses of Henry or William are available here. No unrelated portraits are shown.
Augustus Siebe
Engineer · Saxony to Berlin and London · 1788–1872
Susannah Glidden
Susannah Glidden · 1796–1856
Their son · second son
Henry Herapath Siebe
Henry Herapath (also Herepath) Siebe · c. 1830–1887; a supplied account gives 1885
Their daughter
Mary Siebe
Mary Siebe · daughter of Augustus and Susannah
Married
William Augustus O’Gorman
William Augustus O’Gorman (also Gorman) · born in Limerick, died 1904; reportedly aged 70
Mary + William · Their son · second son / Their daughter
Their son
Augustus Gorman
Birth and death dates not established. Identified as William’s son in the reader-supplied account; the relationship awaits independent confirmation.
Their daughters · Grace’s Guide
Augusta E. Gorman
Born c. 1862. Named as a daughter of William and Mary in Grace’s Guide; the approximate date needs checking against primary records.
Their daughters · Grace’s Guide
Matilda J. S. Gorman
Born c. 1864. Also named as their daughter in Grace’s Guide; the approximate date needs checking against primary records.
Short period · dates not established
Augustus Gorman at Siebe & Gorman
The reader-supplied family account says that William’s son Augustus worked for the historic Siebe & Gorman company for a short time. This places him in the family business, but it does not identify his job, when he joined or left, or whether he held a management role.
This employment and relationship have not been independently confirmed. He should not be confused with his father William Augustus Gorman, the partner who joined Henry Siebe in 1868 and continued the business after their partnership ended in 1878. A September 2026 check of the Science Museum Group records, Grace’s Guide and the Burchetts’ published company history found no confirmed dates or role for him. The 1861 census at 5 Denmark Street lists a granddaughter Marien (age 3), and the 1881 Putney household lists only daughters Augusta and Matilda, so no son appears in either.
Business partners from 1868 · Son-in-law of Augustus · brother-in-law of Henry
Henry’s death is dated 1885 in the supplied account and 1887 in several later histories. We retain both dates rather than silently choosing one.