The question was
what was the Gist exploration. To quote
directly from our source:
On 31 October 1750, Christopher Gist left the vicinity of Cumberland, MD, crossed the mountains, and descended the Ohio until just east of its falls (Louisville). He became the first English explorer to traverse central KY Before ending his journey on 18 May 1751 in Yadkin Valley, NC.
The question (and
answer) were taken from p. 159 of A Dictionary of American History by Thomas L.
Purvis. The book was published in 1995
by Blackwell Publishers Inc.