Heights given from the Foundation Stone course
1 foot = 30.48 cm
1 inch = 25.4 mm (12 inches = 1 foot)
Diameter - from outer wall to outer wall
Thickness - of the walls
The thickness or depth of most courses are 12 inches
Second Complete Course is 18 inches (1 ft 6 in).


Imperfect or Foundation Course
Stones - 18 (4 granite and 14 sandstone)

Course 2 (II) - First Entire Course
Diameter - 42 ft
Stones - 123 (52 granite and 71 sandstone)

Course 27 - (XXVII) - Staircase
Height 32 ft 8 in
Diameter - 19 ft 8 in
Thickness - 6 ft 8 in
Stones - 38 (sandstone)

Course 39 - (XXXIX) - Provision Storeroom
Height 45 ft 11 in
Diameter - 18 ft
Thickness - 3 ft 1½ in
Stones - 16

Course 48 - (XLVIII) - Oil Storeroom
Height 55 ft 10 in
Diameter - 16 ft 10 in
Thickness - 2 ft 6 in
Stones - 16

Course 57 - (LVII) - Kitchen
Height 65 ft 8 in Diameter - 16 ft
Thickness - 2 ft ½in
Stones - 16

Course 66 - (LXVI) - Bedroom
Height 75 ft 8 in Diameter - 15 ft 6 in
Thickness - 1 ft 7 in
Stones - 16

Course 75 - (LXXV) - Library Height 85 ft 11 in
Diameter - 15 ft
Thickness - 1 ft 6 in
Stones - 16

Course 86 - (LXXXVI) - Lightroom and Balcony
Height 97 ft 9 in
Diameter - 13 ft 6 in
Thickness - 1 ft 3 in
Stones - 8

Course 90 - (XC) - Lightroom and Chandelier
Height 102 ft 6 in
Stones - 8
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