SPECIAL AGENT. A special agent is one whose authority is confined to a particular, or an individual instance. It is a general rule, that he who is invested with a special authority, must act within the bounds of his authority, and he cannot bind his principal beyond what he is authorized to do. 2 Bouv. Inst. n. 1299; 2 John. 48; 1 Wash. C. C. lT4; 5 John. 48; 15 John. 44; 8 Wend. 494.