Ferdinand St Maur, Earl St Maur

[4] He briefly served as a volunteer on the staff in the Anglo-Persian War (1855–1857), alongside Lord Schomberg Kerr and Ulick de Burgh, Lord Dunkellin, and was assigned by James Outram to work with his Political Secretary Robert Lewis Taylor (c.1821–1905) of the Bombay Native Infantry.

[3] He resigned his Guards commission at the beginning of 1860, and positions of Captain Commandant in the Wiltshire militia by June 1860.

[6] Seymour went to Italy a civilian volunteer in 1860, and joined Giuseppe Garibaldi's Esercito Meridionale (Southern Army) as a private soldier.

[16] Seymour was Military Secretary under Colonel John Whitehead Peard of the British Legion by October 1860.

[19] It was argued at the time that Scott and "an Italian" who used the name Captain Hugh Forbes were interfering with the British Legion's effectiveness, as outsiders.

[11] Forbes, like Scott, was of British birth, had lived in Italy for a long period, and was a veteran of the 1848–9 conflicts.

[21] Forbes's candidate for commander of the British Legion, called Hicks, had been thrown out of the party before it sailed from Harwich by William James Linton, accused of financial irregularity.

[24] Isaac wrote a conciliatory letter, published in the Army and Navy Gazette of 15 December 1860, referring to the assault as "an old man beaten over the head with a hunting crop".

[33] In 1866 Seymour began a relationship with a 17-year-old maid called Rosina Elizabeth Swan, of Higham, Bury St. Edmunds, Suffolk.

A few months after the birth of his son, Seymour died during a botched emergency tracheotomy at his flat in Dover Street, Mayfair, London.

If Seymour had been married to Rosina, Harold would have now been the heir to his grandfather's dukedom; and he spent years trying to prove that a marriage had taken place.

[citation needed] Searching for a possible Dutch witness to the marriage, by the name of Ravesteyn, he vainly published an advertisement in a newspaper in the Netherlands in 1924, offering a reward of £50 for proof of the fact.