That is a superb group of medals. Thank you for showing it.
The mention of Bird's River reminded me of a later action at this location that resulted in several more hard-won single clasp 'Cape Colony' QSA's being awarded. After the action on 6 February 1900 that you described, the Colonials under General Brabant regrouped before pushing forward again. For a second time, contact was made with the Boers at Bird's River. On 15 February, an advance patrol of men from Brabant's Horse and the Cape Mounted Rifles was fired upon by the Boers and several men were killed, including Captain E C H Crallan, Brabant's Horse. Their lonely graves are shown below.
(From the book 'A Guide to the Battlefields, Graves and Monuments of the Anglo-Boer War in the North-Eastern Cape. Published by the War Museum of the Boer Republics.)
I have in my collection the Zulu War medal awarded to Crallan when he was a Sergeant in the Natal Mounted Police. His single clasp QSA (CC) was sent to his widow, but it has since been separated from the Zulu War medal.
Crallan was evidently held in high regard and, after visiting the site of the Bird's River skirmish, General Gatacre wrote a personal letter of condolence to his widow.