Sentence:  ... in a plea to an action of debt on <WSD>"specialty</WSD>", it is still necessary to show that the debt on which the judgment was recovered was a <WSD>specialty</WSD>, or to aver that the judgment was recovered before the defendant had notice of the plaintiff's demand. 
Meaning of the word marked with <WSD> tags:  A contract or obligation under seal; a contract by deed; a writing, under seal, given as security for a debt particularly specified.