Write the next sentence in this paragraph:

How to construct a sandstone wall
Pick the location.
Make sure you aren't preventing natural run-off water from the position of the wall and footing. Observe the land in question for a few days prior to doing any work.

pick from the following. i. Trace the run-off the day before the project, take your measurements and cut out a path to the location. The path may be difficult to follow, but be sure to have all your permits completed in two days.. ii. Pay special attention to the area after it rains. You don't want to disrupt the flow of water so that it floods into your neighbor's property.. iii. Select a location that has not been disturbed in a long time. The distance of your yard from your home is always a good place to begin for any repairs you might have to make.. iv. After the initial survey, use this as a basis for final calculations. Later, you can calculate your actual cost..
ii.