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.
STREET
PLAN OF NEWPORT MON
Source:
"A Guide To Newport, Mon. Being No 113 of The "Borough" Guides. Printed and Published by R. H. Johns, Ltd., Newport"