I am a Hyrne descendant from Colleton County, SC, and I have Beulah Glover's book. I would be glad to copy what she wrote of the Hyrnes and send it to you. The best I have seen, however, was Vol .2 of S. C. Genealogies. There is an entire section on the Hyrnes. This was published by the Reprint Company in Spartenberg, S. C., and is out of print, I understand. They also re-published Beulah Glover's book of which you spoke, "Narratives of Colleton County."
Nita Glover Eason