Which preposition to use with countie

within Occurrences 1%

"Right reverend fader in God, right trusty and right wel-beloved, we grete yow wele, and wol and charge you that under oure greate seale, being in your warde, ye do make in all haist our lettres of proclamation severally to be directed unto the shirrefs of everie countie within this oure royaume.

Which preposition to use with  countie