By moving the slider (top right) you can zoom in on the map. To zoom in even more enter a larger number in the % box (eg 400).
You can drag the map around to see the whole area, or use the horizontal and vertical slide bars.
PLAN OF THE INDUSTRIAL SCHOOL, GROUND FLOOR, MILL STREET, CAERLEON, MONMOUTHSHIRE
Image copyright. Appears here courtesy of Gwent Records Office.