"It is doubtful that John Hogg ever lived in Abbeville County, although he may have purchased land there. The evidence is much stronger that he lived close to Daniel and Isaac Horsey in what became Newberry County. Daniel settled on Second Creek, a tributary of the Broad River as early as 1756 according to South Carolina land grants. His last will and testament was also probated in the Ninety Six District. The inventory of Daniel’s personal possessions was made by Lewis Hogg (a son of John Hogg), Ephraim Cannon and Gabriel Anderson on May 12, 1783, nearly twenty (20) years after he wrote his will and after some sense of order was restored following the American Revolutionary War."
Colonial records for the area close to Charleston also has some Horseys that fought in the Rev. War. The muster records will help immensely unless you are looking specifically at finding info on Isaac.
The foregoing is all that I know currently. I have tried to get a location fix from records of Jacob Alewine who immigrated out of Berks County, PA, or from James Maffet, whom I believe immigrated from Cecil County, MD. Unfortunately, Job Caldwell Patterson arrived too late to get a better location fix from him. So.... my best GUESS is that he lived near the current intersection of Suber and Rawls Road about two (2) miles west of Broad River Road before Second Creek joins Hellers Creek.
Do you have anything on Gabriel Anderson ? He is all over the place from York County, SC, to Edgefield County and an important "player" for a period after the Rev. War.
Of course there is a connection between Gabriel Jones, Attorney of the Shennandoah Valley and best friend of Peter Hogg, and the Hogg family. Gabriel married a Strother, too. In a backward way, he ties the Jones, Strothers, Hoggs, Pattersons and Taylors all together, but I haven't connected the Horseys yet. On the other hand, if I could prove it.... I would publish it !!