COVENANTS PERFORMED, pleading. In Pennsylvania, the defendant may plead covenants performed to an action of covenant, and upon this plea, upon informal notice to the plaintiff, he may give anything in evidence which he might have pleaded. 4 Dall. 439; 2 Yeates, 107; 15 S. & R. 105. And this evidence, it seems, may be given in the circuit court without notice unless called for. 2 Wash. C. C. R. 456.