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CLACKMANNAN TOWER 181 SECOND PERIOD Here we have, first (Fig. 144), the original rectangular keep of the fourteenth century, 24 feet by 18 feet internally, with walls 6 feet thick (tinted black on plan). The entrance seems to have been on the ground level, with a straight stair, in the thickness of the wall, leading to the FIG. 146. Clackmannan Tower. Fireplace. hall on the first floor. Over this is the upper hall, with private rooms on the floor above, and an attic room in the roof for the garrison, entering from the battlements. These have bold corbels, but no machicolations (Fig. 145). In the thick walls there are the usual chambers for garde-
