A nice example of the Bowles's pirated edition Lewis Evans' seminal map of the British Colonies in North America.
Along with the maps of Henry Popple and John Mitchell, Lewis Evans map is considered among the most important and influential American maps of the 18th Century and is the only one of the three to have been published by an American. Both Evans and Mitchell's maps were intended to spur western expansion into the Trans-Allegheny, Ohio Valley and regions westward and in response to French encroachments.
Evans' map became the standard for nearly 50 years, being re-issued Jefferys, Bowles, Kitchen and others. The map is a milestone both for its political significance and extension of cartographic knowledge in the region. Governor Thomas Pownall re-issued an updated edition of the map in 1775 taken from the original Evans plate, with and addition of New England and a group of tables, naming townships in the Colonies. The cartographic importance of the map and its place in the history of cartography are substantial. Bowles' published several editions of the map beginning in 1765, this being state 4.