What might be of interest is another item, immediately below the one about the sheep market. I am asuming this is your Nathaniel, given the reference to being a prison warder on the IOW
The Cambrian News and Merionethshire Standard
18th May 1900
ANOTHER LETTER FROM BLOEMFONTEIN. On Monday last, Mrs Mary Jones (late Aberdwr), Peutre, received another letter from her son
Corporal Nathaniel Jones, attached to No. 9 Bearer Company Royal Army Medical Corps, 1st Cavalry Brigade, who has been stationed at the Base Hospital, Cape Town, since the commencement of the war, but has been recently removed to Bloemfontein. Corporal Jones was under the impression that hostilities would have ceased before this letter reached his mother. He pathetically enumerates the hardships he has experienced during the period he has been out, such as the inadequate supply of clothing and the unavoidable consequences arising there from, the scarcity of water, the defective supply of all foodstuffs provided, etc. He has been twice promoted during the war, first to lance corporal and again to corporal. He informs his mother he is quite happy, though he would prefer the life of prison warder, as he was employed in one of H M.'s prisons prior to his being called to the front as a reservist. He longs to be home again with his wife and family who reside at Newport, Isle of Wight.
http://newspapers.library.wales/view/3317091/3317099/57/