Morning Les
Your GGF died in the Orange Free State. Casualty locations for the ABW are tricky and often imprecise.
Using the gazetteer my father and I wrote - A Gazetteer of the Second Anglo-Boer War 1899-1902 (Military Press, Milton Keynes 1999) I have looked into the location and come with three possibilities. Although the 14th Hussars are not mentioned, they were at one of these points. Some careful re-reading of the sources and The Times (or other newspapers) would be beneficial looking for references to the 14th Hussars.
Grootfontein
[2926: 2930-2645 not marked] a farm in the Orange Free State (Dewetsdorp district; Free State), ten kilometres north-east of Dewetsdorp. On 24 April 1900 a column commanded by Major-Gen J.D.P. French heading towards Thaba 'Nchu* was engaged by the Boers, six were killed and 22 wounded. This action known as Rooi Kop (3)* in the casualty rolls. On 17 November, a Boer laager was spotted near the farm by mounted infantry from the garrison at Dewetsdorp* commanded by Maj W.G. Massy, RFA; on 19 November, it moved to Damfontein (2)*. HMG III p.491 (map no.54), CR, Bell.
Roode Kop Ridge
[2926: 2928-2630] a farm and prominent hill, 1,718 m high, in the Orange Free State (Dewetsdorp district; Free State) 20 km north-west of Dewtesdorp. Variants: Rooikop (Afrikaans spelling for the name of the hill as used on the 1: 250,000 map); Roodekop Hill (used by Goldmann). Barring the British advance on Dewetsdorp* from Bloemfontein (2)*, Veg-Gen P. Fourie was sent with a force to hold the ridge. On 24 April 1900, the 16th (Queen's) and 17th (Duke of Cambridge's Own) Lancers were sent to seize the ridge, but heavy enfilading fire prevented any advance until the 9th (Queen's Royal) and 12th (Prince of Wales's Royal) Lancers captured the hill and brought pom-poms into action. HMG II pp.322323 (map no.35 (incorrectly located)); Times IV pp.70 and 71 (map of the Orange Free State in the front pocket); Goldmann pp.205-206 (fourth map facing p.218).
Rooi Kop (3)
[2926: 2930-2645 not marked] a farm in the Orange Free State (Dewetsdorp district; Free State), ten kilometres north-east of Dewetsdorp. On 24 April 1900 a column commanded by Major-Gen J.D.P. French heading towards Thaba 'Nchu* was engaged by the Boers, six were killed and 22 wounded. This action is known as Grootfontein* in HMG. HMG III p.491 (map no.54), CR, Bell.
The 14th Hussars suffered 1 killed and 10 wounded on the day. The man killed was Cpt PR Denny who is reported in The Last Post (M Dooner) as being killed at "at Roodekop, near Dewetsdorp". He is buried on the battlefield with a memorial in Bloemfontein Cathedral (amongst others in the UK).
Regards
Meurig