If you go into the batteries and into the fort, and run your eye along the guns, you will see that all of them can be aimed at a gunboat in the river. They all point straight down stream, and a concentrated fire can be poured upon a single boat. The river makes a bend as it approaches the batteries, so that the boats will be exposed on their bows and sides. A mile above the fort you see the little village of Dover. Beyond the village a creek comes in. It is high water, and the creek is too deep to be forded. On the south side of the hill, beyond the fort, between the fort and the village, are log-huts, where the Rebel troops have been encamped through the winter. A stream of clear running water comes down from the hills west of the village, where you may fill your canteen. Going up the hill into the fort, and out to its northwest angle, you see that the fortifications which the Rebels have thrown up consist of three distinct parts,--the fort and the water-batteries, a line of breastworks west of the village, called field-works, and a line of rifle-pits outside of the field-works. You begin at the northwest angle of the fort, face to the southwest, and walk along the field-work which is on the top of a sharp ridge. The embankment is about four feet high. There are a great many angles, with embrasures for cannon. You look west from these embrasures, and see that the ground is much broken. There are hills and hollows, thick brush and tall trees. In some places the trees have been cut down to form an _abatis_, an obstruction, the limbs lopped off and interlocked. [Illustration: FORT DONELSON. 1 The Fort. 2 Field-works. 3 8 Rifle-pits. 4 Town of Dover. 5 Log-huts. 6 Water-batteries. 7 General McClernand's division. 8 General Lewis Wallace's division. 9 General Smith's division. 10 General Grant's Head-quarters. 11 Gunboats. 12 Light Creek.]