Well. I may have lied. I will probably do some more digging tomorrow. But not excavating the hole -- so maybe that doesn't count. I was looking at the earth surrounding the pond edge. I over dug a bit already. The lower side is easy because there is so much loose dirt from the hole piled up around -- it's nice and easy to move. On the high side, it's concrete. I was trying to dig in with my pickaxe "claw" and it's just solid. I did a little more scraping there and discovered quite of few of the boulder-like clay deposits. And tree roots. Ugh. I removed two basketball sized blobs, but I have a couple more to get.