Gt-gt-gt-uncle to Rose Webb who informed me of him and his daughter and son-in-law.

In June 1843 he was stationed in Malta, a Lt, with the 1st battalion of the 42nd (The Royal Highland) Regiment.

I wonder if this death is his:

Surname   First name(s)   Age   District   Vol  Page
Deaths Dec 1892   (>99%)
Douglas Henry Sholto 71 S. Shields 10a 40
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The Douglases with the earldom of Morton (S) often carried the Sholto forename.
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Jeremy Douglas sent me a couple of photos of gravestones in St Mary's Church, South Stoneham, Saint Mary's Church Close, Southampton, one for him stating he was 70 at death, and one for his daughter Ethel who died on 10 July 1887 aged 23.  To corroborate the latter, here is the FreeBMD index record:

Surname First name(s) Age District Vol Page

Deaths Sep 1887   (>99%)
Douglas Ethel Louise 23 Alderbury 5a 103

But no other entries can be found on English publis records.
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In the 1891 census his family was:

First name(s) Last name Relationship Marital status  Gender  Age  Birth year  Occupation  Birth place

Henry S Douglas Head Married Male 70 1821 Retired Captain Army P D L  Bevere, Worcestershire
Mary Douglas Wife Married Female 69 1822 -  Bray, Ireland
Henry M S Douglas Son Single Male 43 1848 Lieutenant Colonel Retired  Ryde, Hampshire
Annie Douglas Daughter Single Female 39 1852  -  Cheltenham, Gloucestershire
Florence Douglas Daughter Single Female 28 1863  -  Leicestershire
Emma Campbell Sister Widow Female 60 1831  -  Harrow, Middlesex
George S D Murray Nephew Single Male 43 1848 Barrister  Handsworth, Warwickshire
Ernest H Levy Servant Single Male 28 1863 Butler Domestic Servant  Whiteparish, Wiltshire
Henry S Snelling Servant Single Male 19 1872 Footman Domestic Servant  Southsea, Hampshire
Ellen Foyle Servant Married Female 48 1843 Cook Domestic Servant  Midhurst, Sussex
Annie Postlewhaite Servant Single Female 31 1860  Ladies Maid Domestic Servant  Gloucester
Jane Pitcomb Servant Single Female 27 1864 House Maid Domestic Servant  Chithurst, Sussex
Emma Hewson Servant Single Female 49 1842 Ladies Maid Domestic Servant  Middlesex, England
Hanny Pennell Servant Single Female 19 1872 Under Housemaid Domestic Servant  Teffont Magna, Wiltshire
Sarah Richmond Servant Single Female 20 1871 Kitchen Maid Domestic Servant  Lincolnshire

Census details
First name(s) Henry S
Last name Douglas
Relationship Head
Marital status Married
Gender Male
Age 70
Birth year 1821
Occupation Retired Captain Army P D L
Birth town Bevere
Birth town as transcribed BEVERE
Birth county Worcestershire
Birth county as transcribed WORCESTERSHIRE
Birth place England
House name Moorlands
Street Chapel Street
Town Bitterne
Parish South Stoneham
City -
County Hampshire
Registration district South Stoneham
Archive reference RG12
Piece number 924
Folio 60
Page : 8
Record set 1891 England, Wales & Scotland Census
Category Census, land & surveys
Subcategory Census
Collections from Great Britain
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From the Family Search marriage record, his father was William Douglas.
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From the censuses and other records, their children were:

Henry Mitchell Sholto, b, 1848, Cheltenham, Glos; C: 30 Jun 1847 IoW. Died ca Feb 1931, St Ives, Hunts.
Mary, b. 1850, Ryde, IoW
Annie, b. 1851, Cheltenham, Glos
Ethel, b. c. 1854, d. 1887
Constance, b. 1859, Leics
Florence, b. 1860, Leics
Edith, b. 1865 Lutterworth, Leics
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From a research paper held on the Australian Trove site, it appears that his family had held a Scots estate called Timperdean, Roxburghshire for many generations from c.1500 to the middle of the 19th century when George Douglas, elder brother to this Henry Sholto Douglas, sold the property.  The first Douglas to hold this proerty was descended through a natural daughter from one William earl of Douglas, apparently sometime in the middle of the 15th century.  I am not researching this further as they are only related by marriage of a daughter of this Henry Sholto Douglas to a half brother of Mary Hodgson Gillett who married Henry Eden Trotter and are my gt-grandparents.
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His probate index:

DOUGLAS Henry Sholto of Moorlands Bitton Hants formerly captain in Her Majesty’s 42nd Regiment died 11 December 1892 Probate London 12 January to Nathaniel Bridges solicitor George Sholto Douglas Murray esquire barrister-at-law and Henry Mitchell Sholto Douglas colonel on the retired list of Her Majesty’s Army  Effects £10392 13s. 3d.

(Henry Mitchell Sholto Douglas was his eldest child and only son.)
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For him:

IN Loving memory of

Henry Sholto Douglas
of Morlands Bitterne
Died December 11th 1892
Aged 70 years
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For his daughter Ethel:

ETHEL

The Dearly Loved Child of
H. Sholto Douglas
of Morlands Bitterne
Died July 10 1887 Aged 23.
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This looks like their marriage:

Henry Shalto Douglas
mentioned in the record of Henry Shalto Douglas and Mary Mitchell
Name: Henry Shalto Douglas
Spouse's Name: Mary Mitchell
Event Date: 1846
Event Place: St. Thomas, Ryde, Hamps., England
Father's Name: William Douglas
Spouse's Father's Name: James Dyke Molesworth Mitchell
Indexing Project (Batch) Number: M16666-1 , System Origin: England-VR , GS Film number: 1470889 , Reference ID: 2:3PC99DX
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And this:

Surname First name(s) District Vol Page
Marriages Sep 1846   (>99%)

Douglas Henry Sholto I of Wight 8 367
Mitchell Mary Isle of Wight 8 367
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