spial

spial

(ˈspaɪəl)
n
1. an observation
2. archaic a spy
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in classic literature ?
But yet their trust towards them, hath rather been as to good spials, and good wbisperers, than good magistrates and officers.
Rossi, "Health behaviour in persons with spial cord injury: development and initial validity of an outcome measure," Spinal Cord, vol.