| Barker | C | | | 1st Battalion
Source: QSA and KSA medal rolls | Essex Regiment |
| Barker | C | 1057 | Private | 2nd Volunteer Company, 2nd Battalion
Source: QSA roll | (Duke of Cambridge's Own) Middlesex Regiment |
| Barker | C | | | Source: QSA and KSA medal rolls | No 4 Mountain Battery, RGA |
| Barker | C | | | 1st Battalion
Source: QSA and KSA medal rolls | King's Own Scottish Borderers |
| Barker | C | | | 2nd Battalion
Source: QSA and KSA medal rolls | Manchester Regiment |
| Barker | C | 3121 | Private | Died of disease. Kloof Camp, 15 January 1900
1st Battalion.
Source: South African Field Force Casualty Roll | Essex Regiment |
| Barker | C | 4139 | Private | Died of disease. Naauwpoort, 2 May 1900
2nd Battalion.
Source: South African Field Force Casualty Roll | (Prince of Wales's) North Staffordshire Regiment |
| Barker | C | | | 2nd Battalion, 1st Volunteer Service Company
Source: QSA and KSA medal rolls | Cheshire Regiment |
| Barker | C | | | Source: WO100/146 | No 4 Mountain Battery, RGA |
| Barker | C | | | Source: QSA and KSA rolls | DEOVR |
| Barker | C | | | 3rd Battalion
Source: QSA and KSA medal rolls | East Yorkshire Regiment |
| Barker | C | 3121 | Private | 1st Battalion
Demise: Died of disease - heart 15 Jan 1900
Place: Colesberg Nr, Kloof Camp
Source: In Memoriam by S Watt | Essex Regiment |
| Barker | C | | | 1st Volunteer Company, 2nd Battalion
Source: Medal rolls | Cheshire Regiment |
| Barker | C | | | 3rd Volunteer Company, 2nd Battalion
Source: Medal rolls | Cheshire Regiment |
| Barker | C | | | Volunteer Company, 2nd Battalion
Source: Medal rolls | Cheshire Regiment |
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