In the April to June 1866 birth index Caroline H. M. Hart, St. Margaret, Westminster, London, volume 1a, page 352.

Parish Records St Pauls, Hounslow Heath
Baptism, April 29, 1866 Caroline Hilda Hart, parents Joseph and Elizabeth Hart, abode Hounslow, father’s occupation Musician.

In the 1871 census 122 Lillington Street St John the Evangelist civil parish, Holy Trinity Ecclesiastical parish, London, St George Hanover Square district, St John Westminster sub district.
Joseph Hart age 39, musician born at St Lukes, Chelsea, Middlesex.
Wife Elizabeth Hart age 36, born at Hounslow.
Son Joseph Hart age 10 born at Hounslow.
Daughter Hilda Hart age 5 born at London.

In the 1881 census living at 2 Dorset Street, St John the Evangelist civil parish,, London, St George Hanover Square Registration district, St John Westminster.
Joseph Hart age 46 born in India, musician. [There is a discrepency between his age and birth place for the 2 census]
Wife Elizabeth Hart age 46 born at Hounslow.
Son Joseph Hart age 21, born at Hounslow, postman.
Daughter Hilda Hart age 15, born at London, needlewoman.
Son Frederick Hart age 7, born at London.
They had a lodger.

In the July to September 1883 marriage index Caroline Hilda Hart, St. George Hanover Square district, London, Middlesex, volume 1a, page 936. The men on the page are George Brockett and George Clark.

In the 1891 census Ayksford Street St George Hanover Square district, Belgrave subdistrict, London.
Head George Brockett, married, age 27, musician, born Kingston, Surrey.
Wife Caroline Brockett, age 25, born Westminster, London.
Son Francis H. G.? Brockett, born Pimlico, London.
Daughter Hilda A Brockett, age 2, born Westminster.
Daughter Daisy Brockett, age 11 months, born Battersea.

In the 1901 census 7 Groton Road, Wandsworth, London.
Caroline H. Brockett, wife, age 35, born Westminster, Middlesex.
Daughter Caroline H. S. Brockett, age 12, born Westminster.
Daughter Daisy Brockett, age 10, born Battersea, Surrey.
Son George Brockett, age 8, born Maidstone, Kent.
Son William Brockett, age 6, born Maidstone.
Son Bertie Brockett, age 3, born Maidstone.
Son Frederick Brockett, age 1, born Earlsfield, Surrey.

In the October to December 1905 death index, Caroline H. Brockett, age 39, Wandsworth, Greater London, Surrey, volume 1d, page 357

In the January to March 1864 birth index George Brockett, Kingston, Surrey, volume 2a, page 230.

Parish Records Kingston-on-Thames Parish, Surrey
Baptism November 19, 1871
Sophia Catherine Brockett, Catharine Brockett and George Brockett, their parents Francis Henry Brockett and Agnes Georgina Brockett, abode Kingston, father is a Staff Sergeant.

In the 1871 census Militia Barracks, Eden St., Kingston on Thames, Kingston, Norbiton, Surrey.
Head Francis Brockett, married, age 32, Sergeant 3rd Surrey Militia, born Twickenham, Middlesex.
Wife Agnes Brockett, married, age 29, born St. Lukes, Middlesex.
Son Francis Henry Brockett, age 10, scholar, born Kingston, Surrey.
Daughter Rosa Jane Brockett, age 9, scholar, born Kingston.
Son George Brockett, age 7, scholar, born Kingston.
Daughter Agnes Brockett, age 2, born Kingston.

Parish Records St. John, Kingston Upon Thames, Surrey
Baptism Sunday November 19, 1871 Sophia Catherine Brockett born October 1, 1871 and George Brockett, born December 30, 1863, parents Francis Henry Brockett and Agnes Georgina Brockett, father’s occupation Staff Sergeant.

Military Records
Attested at Aldershot April 2 1879, 53rd Corps Regimental Number 1160. Added later Scots Guards no. 5447
Born Kingston-on-Thames, Surrey
Trade: Musician
Ever served in the Militia: Yes, 3rd Surrey Militia, but has been discharged
What Corps are you willing to be enlisted: 21st Brigade
Who gave you notice: Sergeant Major William Starsham?, 53rd Foot
Willing to serve the term of twelve years: Yes
Age: 18 years
53rd Regiment [53rd (Shropshire) Regiment of Foot]
Private April 3 1879 to March 31 1881
Promoted Lance Corporal April 1 1881
Shropshire Regiment [name change to The Kings Light Infantry (Shropshire Regiment)]
Lance Corporal July 1 1881 to November 20 1881
Scots Guards
Transferred Private December 1 1881
Army Reserve
Transferred to Army Reserve Musician October 21 1885 until April 2 1889
Imprisoned by Civil Power for non payment of Bastardy arrears April 3 1889 to May 14 1889
Released Musician May 15 1889 to March 28 1891
Discharged April 2 1891 having served 12 years
Next of Kin: Father Francis Henry Brockett, mother Agnes - Wimbledon
Married to Caroline Hilda Hart August 18 1883 at St. George Hanover Square
??? Forwarded to Chelsea Hospital December 18 1903
Brockett discharged invalided from Royal West Kent Regiment January 1 1901
[When George Brockett transferred as a musician to the band of the Scots Guards, his first cousin, Henry John Symondson (or Simmonds) was also serving with the band. 5 years after George transferred to the Army Reserve Henry’s brother Alfred, my great grandfather, also transferred into the band. 4 years after that another of Henry’s brothers Herbert joined the 2nd Battalion Scots Guards Band.]

In the 1881 census District Royal Marine Light Infantry, Gillingham, Chatham, Kent.
George Brockett, unmarried, age 20, Lance Corporal 53rd Foot, born Kingston on Thames, Surrey.

In the 1901 census District Royal Mineral Water Hospital, Walcot, Bath, Somerset.
Patient George Brockett, married, age 37, drummer Royal West Kent Regiment, born Kingston on Thames, Surrey.

London Electoral Registers 1901
7 Groten Road, Wandsworth
George Brockett, house

London Electoral Registers 1903
25 Thornsett Road, Wandsworth
George Brockett, dwelling-house

London Electoral Registers 1906
127 Penwith Road, Wandsworth
George Brockett, dwelling-house

A possible match although the age is out by about 3 years
In the January to March 1908 death index George Brockett, age 41, Wandsworth, London, volume 1d, page 342.
[If this is a match then the age should be 44]