1. He is mentioned in Gillian West's article (http://royroyes.net/genealogy/showmedia.php?mediaID=660)
which seeks to trace the influence of Charles Dickens's godfather, Christopher Huffam, on Dombey and Son. He is referred to as son of Solomon and serving as an assistant surgeon with the East India Company who died at the company's establishment in Madras, India.
2. The following entry can be found in the Families in British India Society website:
First Names: Solomon Hougham
Date: 23 Jul 1838
Entry: of Madras, Assistant Surgeon HEICS, bach., to Solomon Royes the father, £20, further grant 17 Mar 1843 to Benjamin Laurence & William Sanigear the executors of the said father, [d 11 Jan 1837, Lawrence of Old Fish St, London, gent., Sanigear of Lombard St, gent., entry at end of month, Estate Duty Registers], Pts
Source Name: Prerogative Court of Canterbury and Related Probate Jurisdictions: Administration Act Books
Source Repository: The National Archives
Source Repository Reference: PROB 6/214, 6/219, IR 26/257
[Note that "our" Solomon Royes died in 1842]
3. KGR has in his data the following:
British Library East India Company Medical Services.
Records of the Military Department
Entry to the military, medical and nursing services of the East India Company's Army (1753-1861) and the Indian Army (1861-1940)
Assistant Surgeons ' and Surgeons' Papers, EIC Medical Service (1804-1858) and Indian Medical Service (1858-1914)
FILE - Assistant-Surgeons' Papers (EIC) - ref. IOR/L/MIL/9/380 - date: 1827-1828
item: Rogers, Solomon Hougham  - ref. IOR/L/MIL/9/380/57-62 [n.d.]
[In light of the other evidence, it is likely that "Rogers" is a misreading of "Royes"]
4. Several of his siblings have "Hougham" as their second name, no doubt reflecting the strong relationship between Solomon Royes senior and Solomon Hougham, who was his uncle but also appears to have played a leading role in fathering him after his father died when he was young. Solomon Royes senior is the major beneficiary of Solomon Hougham's will.
5. A "Solomon Royes junior" is a beneficiary of Samuel Hougham's will, distinct from "my nephew Solomon Royes the elder" - Lydia is referred to as the sister of Solomon junior
6. Did Solomon Hougham Royes visit Sydney? The Colonist
, Sydney, 26 Dec 1838, lists unclaimed letters from the Government Gazette, including: Mr S.H. Royes, surgeon, Madras Army.