The surname Kelso in Chester is often Kelsey. Hugh Kelsey made tombstones for many early families in Chester District. He died in 1817.
There is a different family of Kelso in Lancaster and Spartanburg counties connected with my Jackson and Foster families.
In my next (May) issue of the South Carolina Magazine of Ancestral Research, I will have some Chester District estate divisions from the 1830s. For subscription information, write to SCMAR, PO Box 21766, Columbia, SC 29221. Please send a stamped, self-addressed envelope.