To get an exact position given this scenario (as I understand it), you need 2 (two) intersecting lines theoretically. Due to error/accuracy it's better to get 3 bearings. Ok though, lets just settle on 2 bearings. This is why Dryer's solution works (in a way). Although he possibly had to move to attain the second bearing (the section road), that road bearing along with the bearing to the (plotted on the map) grain tower gives you the two intersecting lines. Unless you know the distance accurately, the easiest way is 2 intersecting lines. I am assuming that you really don't know how far the town is accurately, otherwise you would know where you were anyway.

sK