Here are the details of the map for Belsize Park:
This very detailed map covers Belsize Park, which was being developed as a residential area in the late 19th century. Features on the 1866 map include Haverstock Lodge, Belsize Farm, St Peter's church, Highfield House, Woodlands, Hillfield. The 1866 map is so detailed that even garden layouts are shown for many houses. Some streets of housing were still under development at the time but are shown more complete on the 1894 map and the introduction by Pamela Taylor explains the historical background.
The map links up with sheet 7.01 Kentish Town West to the east