|Title||Letter from Thomas Colby, Lieutenant Colonel, Ordnance Survey Office, to General Mann|
|Date||24 August 1829|
|Description||Copy letter regarding measurements for the ordnance survey on Loch [Lough] Foyle near Magilligan. Contains table of areas and their respective proprietors and lease details. |
Enclosed with related record.
|Related records in the catalogue||MC/1/173a|