I was foiled when I researched my theory that Sandy Eastwall might be the little girl that TC rescues from snakebite in TPTP...no her name is clearly Karen (unless everybody since then calls her Sandy). It seemed to me, at the time that age-wise Sara or Sandy might have made sense. Wouldn't make any sense if it were Sara.
...as we know what Roger did to her...
I still think it would be very interesting if Karen's character somehow returns in the Final Chronicles. In fact it may be possible that Karen's family moved away...and, here's the clincher: maybe she somehow contracted leprosy (showing up 5 or ten years later)! Well, just think about it anyway. I mean maybe we assume the poison burned away any possible contagion...but remember Covenant's mouth
was bleeding fairly profusely when he sucked it out. Leprosy is more contagious in children...
This sort of goes along with Nerdanel's
Land of Lepers theories that involve Linden and Joan...and Finn's
Joan the Leper...