The Blueprints

John had found something that would greatly help him in his backyard search: municipal records of the part of Tucson that he lived in. He searched through the documents until he found what he needed. Aside from a record stating the house had been built, there was another thing there. He now had a clearer picture of what to look for. He found a document stating that the company Whitaker Pools built something there in 1961. One thing didn’t add up, however. Why would a swimming pool be built underground?