Anciens Royaumes de Kent, d'Essex et de Sussex
London is at c.20o37' east. The English Channel is called "Mer Britannique" rather than "La Manche"; calling the North Sea the "Mer D'Allegmagne" was common.
There are three scales displayed, including of 24 miles d'Angleterre = 63mm, or 9.7 miles/inch; scale actual = 12.9 miles/inch, or 1:820,000. (His "miles" are 33% larger than statute miles.)