Colby's Ordnance Survey memoir of Londonderry.
Colby, Thomas.
Larcom, Thomas Aiskew,Sir.Memoir of the City and North Western liberties of Londonderry.
Colby, Thomas.Ordnance Survey of the County of Londonderry.
Limavady : North-West,
1990.
Includes index
Previous ed.: published as Ordnance Survey of the County of Londonderry/Colonel Colby, Superintendent. Vol.1. Memoir of the City and North Western Liberties of Londonderry: Parish Templemore/Sir Thomas Aiskew Larcom