Directions for shaping the Surface with a fall every way towards the Pool. First, take down the terrace-wall, then put stakes at twenty-five feet apart each way, and mark on each stake the numbers on the plan. Measure the height of the wall to be removed, and divide it into five equal parts, and this will serve as a scale for the depths. The exact height of this wall not having been sent, I suppose it seven feet and a half, making each division one foot and a half; or, if it be only five feet high, then each division will be only one foot. Dig trenches, crossing each other according to the lines on the plan, and to the depths, corresponding with the sections each way, supposing five feet to the surface of the water; but the pool must be formed and dug out afterwards. The trenches, or pattern lines, being dug two or three feet wide, the whole surface will be easily shaped, by taking away the earth in the intermediate squares.