Sentence:  Thinks I to myself, "Sol, you're run off your course again. This is a rich man's summer &lsquo;cottage&rsquo;nb...." So I started to back away again into the bushes. But I hadn't backed more'n a couple of yards when I see something <WSD>so</WSD> amazing that I couldn't help scooching down behind the bayberries and looking at it. 
Meaning of the word marked with <WSD> tags:  To the (explicitly stated) extent that.