| Clark | J | 32741 | Corporal | Source: QSA Medal Rolls | 108th Company, 6th Btn, IY |
| Clark | J | | | 1st Battalion
Source: QSA and KSA medal rolls | Highland Light Infantry |
| Clark | J | 4089 | Private | Died of disease. Fraserburg, 11 February 1900
1st Battalion.
Source: South African Field Force Casualty Roll | Highland Light Infantry |
| Clark | J | 4170 | Private | Killed in action. Near Kaffirkraal, 7 June 1901
4th Battalion.
Source: South African Field Force Casualty Roll | Bedfordshire Regiment |
| Clark | J | | | 2nd Volunteer Service Company
Source: QSA and KSA medal rolls | East Yorkshire Regiment |
| Clark | J | | | 1st Volunteer Service Company
Source: QSA and KSA medal rolls | Suffolk Regiment |
| Clark | J | | Trooper | Prisoner. Manthe, 25 June 1901
Released
Source: South African Field Force Casualty Roll | Cape Police |
| Clark | J | | | 1st Battalion
Source: QSA and KSA medal rolls | Suffolk Regiment |
| Clark | J | 4731 | Private | Severely wounded. Brakenlaagte, 30 October 1901
2nd Battalion.
Source: South African Field Force Casualty Roll | (King's Own) Yorkshire Light Infantry |
| Clark | J | | | Source: QSA and KSA medal rolls | Suffolk Regiment |
| Clark | J | 3949 | Lance Corporal | Severely wounded. Near Sutherland, 24 January 1902
Source: South African Field Force Casualty Roll | 12th (The Prince of Wales's Royal) Lancers |
| Clark | J | 78192 | Driver | Severely wounded. Tweefontein, 25 December 1901
Source: South African Field Force Casualty Roll | 79th Battery, RFA |
| Clark | J | 3042 | Private | Slightly wounded. Craven's Rust, 9 March 1902
1st Battalion.
Source: South African Field Force Casualty Roll | Imperial Light Horse |
| Clark | J | | | 1st Battalion
Source: QSA and KSA medal rolls | Oxfordshire Light Infantry |
| Clark | J | | | Natal Mounted Police
Source: Medal roll for the SAGS, 1877-79 | Natal Police |
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