Webster’s Revised Unabridged Dictionary · 1913
Espial
Es·pi′al (ĕs·pī′al), n. [OE. & Norm. F. espiaille. See Espy.] 1. The act of espying; notice; discovery.
Screened from espial by the jutting cape. Byron.
2. One who espies; a spy; a scout. [Obs.] "Their espials . . . brought word." Holland.