Here are the details of the map for the Regents Park area:
This highly detailed map at a 'Yard to the Mile' scale covers the northern part of St Marylebone, including much of Regent's Park and the Royal Botanic Gardens. St Marylebone church is at the foot of the map. and other features include Baker Street station, Upper Baker Street, Outer Circle, Marlebone Road, Harley House, Toxophilite Society's Grounds, York Terrace. We include street directory entries for Upper Baker Street, Dorset Place, Dorset Square, Marylebone Road, Park Square, Park Street, Regent's Park and York Terrace in 1859 on the reverse. This map is essential viewing for the Sherlock Holmes enthusiast!
The map links up with Sheets 7.42 Fitzroy Square to the east, 7.51 St Marylebone to the south.