This is an estimated floor plan for the original layout of the law office. In this image, north is located at the bottom. 

This assumption is based on evidence found in the crawl space. The original floor boards are still visible in the crawl space below. There is a noticable diffference in quality of boards used in the western 3.5 feet of the building. This has led to the hypothesis that the original layout of the building had one heated room with an entry hallway. The door was likely located somewhere in the approximate middle of this hallway.