37. A Sketch Design for Barnbougle Castle, by Robert Adam. c. 1774. (National Gallery of Scotland).
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38. Perspective View of the Entrance Front of Barnbougle Castle, by Robert Adam. 1774. (Rosebery Collection, Dalmeny).
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39. Pen and Ink Sketch for Barnbougle Castle, by Robert Adam. c. 1774. (Private Collection).
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40. Incomplete Elevation of the South-West Front of Barnbougle Castle, by Robert Adam. 1774. (Sir John Soane's Museum).
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41. Mountain Landscape with Red Castle (Here Identified as Sketch Design for Kirkdale, Kircudbrightshire), by Robert Adam. c. 1786. (Yale Center for British Art).
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42. A Castellated Mansion (Here Identified as the Office Court, Kirkdale), by Robert Adam c. 1786. (Yale Center for British Art).
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43. A Sketch Design for Beauly Castle, by Robert Adam. c. 1777. (Blair Adam Collection).
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44. Perspective of the South-East Front of Beauly Castle, by Robert Adam. 1777. (Sir John Soane's Museum).