There is some aquatic grass drifting on the stream and even though there is a good hatch on, the large trout before you seems to feed mainly on the duns that are drifting amid the drifting grass. Every time you cast to him your fly lands in the grass. Then for a few seconds he moves over to the edge of the grass and takes three duns. Now is your chance. Quickly cast your fly two feet upstream in that open current and you will probably take him.