Updated version of Camden's Britannia, with new maps provided by Robert Morden. His originally planned maps were replaced by these larger scale ones (the smaller ones appeared in his own atlas in 1701). The Essex map is based on the Ogilby & Morgan of 1678.
After 1695 there were 4 further editions of this version of Camden's Britannia, the last in 1772.
There are three scales, of 10 miles = 78mm, 73mm & 68.2mm for Great, Middle & Small miles, giving 3.3, 3.5 & 3.7 miles/inch respectively; the actual scale is 3.7 miles/inch, or 1:230,000.
The three scales use differing numbers of miles to a degree. The relationship between the three scales varies by county, as does their variation from the statute mile. It is not known why he added all these to his maps.