CREATED/PUBLISHED Boston,  SUMMARY Map covering most of Georgia and South Carolina, showing defenses along the sea coast and around the principal towns, Confederate prisons at Andersonville and south of Millen, Ga., roads, railroads, towns, drainage, and relief by hachures. NOTES Scale ca. 1:670,000. 'The horizontal and upright lines [of the map grid] represent five miles square. By referring [sic] to the number on the left and to the letter on the base, any point may be found to show the locality of the Union armies.'