Sentence:  Thinks I to myself, "Sol, you're run off your course again. This is a rich man's summer &lsquo;cottage&rsquo; and if you don't look out there's likely to be some nice, lively dog taking an <WSD>interest</WSD> in your underpinning." 
Meaning of the word marked with <WSD> tags:  A great attention and concern from someone or something; intellectual curiosity. (from later 18th c.)