Repeat directions on prior page, except that this next string will be a few inches higher (we'll call this the "upper string"), on the same side of the hedge. Measure up from the lower string (at each end) to the upper string, to make sure the strings are evenly separated from each other.
Note that, to be really precise, you could attach a string level to each string, to ensure that they are level (assuming your hedge is resting on level ground). Also, using a carpenter's level, you could make sure that the two strings are plumb (i.e., one directly underneath the other).
In the picture above, notice that my upper string isn't taut yet. That's because some branches are still in the string's way, and I haven't pruned them off yet. I'll prune them off and get the string taut before I begin shearing the hedge.
In Step 6 we'll turn to the other side of the hedge....
