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20a. Drummond’s Letter.
“SLIEVE SNAGHT,“Friday night, Nov. 11, 1825. “My Dear Mother, … I am perched upon the top…
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20. Into the Limelight
From Divis to Donegal Slieve Snaght, the “Snowy Mountain”, rises modestly just over two thousand feet…
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19. Inveterate Haze and Fogginess
Drummond and the Problem of Visibility [i] From the summits of Ireland, when the weather was…
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18. On Exalted Hills
The endurance, innovation, and romance involved in measuring Ireland from remote mountain tops during the triangulation.…
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17. Chapter 4: Introduction
Chapter 4: Triangulation, limelight, human endurance and one of the “Ghosts” of Mountjoy, Thomas Drummond. How…
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16. Why it Matters
The Legacy of the Lough Foyle Baseline – Surveying history under the stars and why the…
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15. Life Along The Line
Life along the baseline in 1830. (Continued from the previous post: 14. Measuring the Base )…
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14. Measuring the Base
The measurement of the baseline. (Continued from the previous post: 13. To Colby The Design ….…
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13. To Colby the Design …
The innovative design and construction of Colby’s compensation bars (Continued from the previous post: 12. The…
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12. The Lough Foyle Baseline
It started with a measured line on the ground, “on which the credit of the whole…
