Upper left margin: Ordnance Survey of Ireland. "Compiled and printed by the Ordnance Survey Department and published by the Director at the Ordnance Survey Office, Phoenix Park, Dublin, 1950." "Railway revised to 1949. Road classification as of 1942." Includes inset of Lambay Island. Covers Dublin region. Relief shown by contours, gradient tints, spot heights, and land form drawings. Maps Library copy is mounted on linen and encapsulated.