RT Map T1 Map of the city of Dublin and its environs, constructed for Thom's Almanac and Official Directory A1 Ordnance Survey of Ireland A1 Alexander Thom PB Alexander Thom PP Dublin, Ireland YR 1874 PB Alexander Thom PP Dublin, Ireland YR 1844 NO Date details: Date taken from hand written date "about 1874" made by Dr. Arnold Horner (formerly of GPEP), based on information in J.H. Andrew’s article "Medium and message in early six-inch Irish Ordnance Maps: the case of Dublin city". NO Creation/production credits: Prepared at the Ordnance Survey Office Phoenix Park under the direction of Lt. Colonel Wilkinson, R.E. NO Creation/production credits: Major General Sir Henry James is given as Director of the Ordnance Surveys. NO Location of original: The original map is held in the Barbara Miller Map Room, UCD School of Geography, Planning & Environmental Policy, E002 Newman Building, University College Dublin. AN uri:info:fedora/ucdlib:33001 DO doi:doi:10.7925/drs1.ucdlib_33001 LK //digital.ucd.ie/?getObject=ucdlib:33001 SL UCD Library, University College Dublin LL Belfield, Dublin 4, Ireland