The Natural History of England - and also in The General Magazine of Arts and Sciences
The maps are based on Bowen's Large English Atlas series which had been published individually up to this date.
The maps were first published in The General Magazine (Essex in March 1759), and then in a two volume atlas published in 1759 & 1763 (Essex is in volume 2).
The Atlas & the individual plates were never reprinted, but were closely copied by Meijer in 1763.
Displayed scale of 12 miles = 32.7mm, or 9.3 miles/inch; actual scale = 8.8 miles/inch, or 1:555,000.