Sentence:  Though they do talk with you, and seem to be otherwise employed, and to your thinking very intent and busy, still that <WSD>toy</WSD> runs in their mind, that fear, that suspicion, that abuse, that jealousy […]. 
Meaning of the word marked with <WSD> tags:  A vague fancy, a ridiculous idea or notion; a whim. (16th-17th c.)