Two drawings from different stages in the design process demonstrate the refining of Lookout’s engineering from thirteen segments of brick to nine. Set at a series of gradually increasing angles, the segments of brick in Puryear’s Storm King commission allow the form to transition from a masonry arch into a dome. The team of masons began its work at the arch, laid over a wooden formwork, creating it as a line of bricks perpendicular to the ground. To end each section and begin anew, the team made angle cuts through bricks they had already laid, creating a new angle for the following segment of coursed brick. When the work reached the ninth segment, the bricks courses were laid horizontally, forming a dome.