Striking full color example of this interest pair of maps.
The map of Egypt extends from the Mouth of the Nile to Thebes, Esneh and El Cornac. Shows the Route to Darfoor from Siout, a 25 mile march over 5 days along the course ofU Upper Nile, Mr. Irwin's Track of 1777, along with towns, rivers, lakes, trade routes, etc. The Map of Abyssinia is highly detailed and tracks several trade routes through the various tribal lands and towns in the region. Striking image. From Thomson's New General Atlas.
John Thomson (1777-ca. 1840) was a commercial map publisher active in Edinburgh. He specialized in guide books and atlases and is primarily known for his Atlas of Scotland (1832) and the New General Atlas, first published in 1817 and reissued for the next quarter century. The New General Atlas was a commercial success—it was also published in Dublin and London—and it compiled existing geographic knowledge in compelling ways for a wide audience.
His Atlas of Scotland introduced new geographic information and was the first large-scale atlas of Scotland to be organized by county. It provided the most-accurate view of Scotland available before the Clearances. Work on the atlas began in 1820 and led to Thomson’s bankruptcy in 1830 due to the high costs of gathering the latest surveys and reviewing the required materials. Despite the publication of the atlas, Thomson declared bankruptcy again in 1835.