Here is information about Sheet 11:
This Inch to the Mile map covers the area around Lough Swilly. Most of the map is in Co Donegal, but a smaller area of Co Londonderry is in the SE corner. Coverage stretches from Rathmelton eastward to Muff, and from Buncrana southward to Derry City.
The major feature is the city of Derry or Londonderry, but other features of interest include stretches of the Londonderry & Lough Swilly Railway, Buncrana Bay, Inch Island, the steam ferry from Fahan to Kerrs Bay, The Cul Bay, Eskaheen Mountain etc. On the reverse we includea map of Londonderry in 1788 from the Ordnance Survey Memoirs.
It is not possible to list the many hamlets, farmsteads and other topographical features shown on these maps. However, you may find it useful if we list the towns and principal villages or church parishes that are included on this map. Links are given for those for which detailed large-scale maps are also available.