Definify.com

Webster 1913 Edition

Noun.

A spy; a scout.

[Obs.]

Bacon.

Noun.

A spy; a scout. [Not in use.]

spial ‎(plural spials)

(obsolete) Espionage.
(obsolete) A spy.
- 1590, Edmund Spenser, The Faerie Queene, II.i:
  And priuie spials plast in all his way, / To weete what course he takes, and how he fares [...].
- 1837 Thomas Carlyle, The French Revolution: A History
  [ Charles François Dumouriez ], roaming far out, obscure, as King's spial, or sitting sealed up, enchanted in Bastille....