By British standards our farms are very large, even the small ones. Our commecial farms can be many thousand hectares and a small farm only 1 000 hectares. So the distance of 68km from Senekal to Bethlehem could indeed have been one farm.
I think the farm, as many have as urban sprawl continues, been portioned up to accomodate the spreading towns and cities.
I can't find a grave for him, but there are many small graveyards and photographing and transcribing them is an ongoing task, especially the small farm graveyards.