Airlie Castle (6)
From the front, it can be seen that the oldest part of the castle, the 15th century east curtain wall, built by Sir Walter Ogilvy from 1432 onwards, is a different colour to the gatehouse, which is known to have been (re)built later.  Tranter states that the north tower, at the righthand end, is the same age as the curtain wall, although the masonry is the same colour as the rebuilt gatehouse.  

The curtain wall is 120 feet long, 10 feet thick and about 30 feet high.  In front, a deep dry ditch was cut across the promontory, of which only a slight dip remains apparent.
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