Latest comment: 1 month ago2 comments2 people in discussion
Looks as though it might mean "sane, rational":
1895, S. R. Crockett, A Cry Across the Black Water
"There's somebody at the boat," she said, "waiting. Let me gang, Aunt Annie: they want me; I hear them cry. O Annie, I hear them crying as a bairn cries!" "Lie doon on yer bed like a clever lass," said her aunt gently. "There's naebody there."