| 21. | From 1864 and 1874 Palmer served with the Ordnance Survey of Great Britain.
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| 22. | He was an officer of the Royal Engineers employed on the Ordnance Survey.
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| 23. | In 1868 he joined the Ordnance Survey of Sinai.
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| 24. | He was 15 years in the Ordnance Survey Department.
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| 25. | The Ordnance Survey shows no name for the island.
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| 26. | It is now the Ordnance Survey convention to name it " Ennerdale Water ".
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| 27. | The Ordnance Survey does not note it but on the Exeter Estate book Twenty.
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| 28. | It is also identified on the Ordnance Survey maps of both 1884 & 1889.
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| 29. | The name remains on the Ordnance Survey maps.
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| 30. | He trained as a surveyor before entering the archaeology section of the Ordnance Survey.
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