There is a brilliant version of Morgans map of 1682 at the Layers of London site; you need to click to use the overlay, then use the sliders on the Overlay tools to get varying images. I also hide all pins.
The Morgan map depicts the city of London 16 years after the Great Fire. This map complements the slightly earlier Ogilby and Morgan map by adding a survey of Westminster and a section of Southwark and showing the changes made to the city from 1676 to 1682. The Morgan map also includes detailed depictions of churches, markets, and great houses located throughout the area and a long panorama of London and Westminster. An original map survives in the British Library.
There is duplication of the numbering system amongst the four sections of the map.
There appear to be four sections of the key, which relate to different sections of the map.
Last, but most important, is the References for City and Liberties of London beginning with No 1 at Little Grays Inne Lane and reaching to No 330 Queens head Court in Newgate street.
The London City section includes about 950 index entries thus being the major section of the map.
The London City listing is split into a number of pages.
London part 1 : 1 to 150 Little Grays Inne Lane to (150) White hart Inne
London part 2 : 150 to 300 White hart Inne, at the northern end of St Johns street to (300) Black horse Court, Aldersgate street
London part 3 : 300 to 450 Black horse Court, Aldersgate street to (450) Mumfords Court, Milk street
London part 4 : 450 to 600 Mumfords Court, Milk street to (600) Fryer Lane - Upper Thames street
London part 5 : 600 to 750 Fryer Lane, Upper Thames street to (750) Cross Lane
London part 6 : 750 to 850 Cross Lane to (850) Bell alley
London part 7 : 850 to 950 Bell alley to (952) King Johns Court
The first is Westminster, and includes about 419 separate key entries, and many of these are Inns (or Innes). Beginning in Portugal street (later named Piccadilly) and ending at 419 Bishops Head court in Grays Inn lane.
I have split this into two pages, WestminsterA and WestminsterB
The second is Southwark and Lambeth, with 222 index entries. Beginning at No 1 White hart yard near Fox hall and Ending at 222 Seven Step alley in Rotherhithe.
The third is St Katherines Wapping, Shadwell and Ratcliffe. This is a smaller index, with only a handful of Inns listed. Beginning at No 1 Queens head alley in Spital Fields and Ending at 188 Fox and Goose yard in Shadwell
Here is -