Definition of pace:
taken with the foot
; an English Customary Unit of distance measuring approximately five feet
[: English Customary Weights and Measures, (C) Russ Rowlett and the University of North Carolina at Chapel Hill (?: Distance, ? No 6)]
"even at the duel, standing 10 paces apart, he could have satisfied Aaron's honor."
walk to and fro
in a small space; set the speed in a race
with all due respect