| Clark | William | 29 | | Occupation: Bricklayer. Next of kin: Wife. Address: Cradock .
Source: Attestation paper in WO126 | Town Guard and District Mounted Troops |
| Clark | William | 28524 | Private | Source: Nominal roll in WO127 | Rand Rifles |
| Clark | William | 217 | Private | QSA (1)
Source: List of QSAs with the clasp Defence of Kimberley | Cape Police |
| Clark | William | | Orderly | Source: Nominal roll in WO127 | Imperial Hospital Corps |
| Clark | William | 41025 | Trooper | No known Company. Served in 39th Btn IY
Source: QSA Medal Rolls | Imperial Yeomanry |
| Clark | William | | | 2nd Battalion
Source: QSA and KSA medal rolls | (Duke of Albany's Ross-shire Buffs) Seaforth Highl |
| Clark | William | | Sergeant | BSACM Rhodesia 1896 (0).
Source: BSACM rolls | Gwelo Burghers |
| Clark | William | 345 | Trooper | 1st Battalion
Source: QSA Medal Rolls | Scottish Horse |
| Clark | William | 1402 | | Source: Attestation paper in WO126 | Bethune's Mounted Infantry |
| Clark | William | 2 | QMS | Source: Nominal roll in WO127 | Colonial Scouts |
| Clark | William | 5 | Trooper | Source: Nominal roll in WO127 | Colonial Scouts |
| Clark | William | | | Source: WO100/283 | Knysna TG |
| Clark | William | 1643 | Trooper | 2nd Battalion
Source: Nominal roll in WO127 | Imperial Light Horse |
| Clark | William | 41652 | Trooper | Served in 2nd KFS. Joined Durban 11 Mar 02 [entry ruled out]
Source: Nominal roll in WO127 | Kitchener's Fighting Scouts |
| Clark | William David | 37513 | Trooper | Served 06 Dec 01 to 30 Jun 02. Discharged Disbandt.
Source: Nominal roll in WO127 | Scottish Horse |
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