The atlas this map is from is a typical example of a lot of atlas publications in the 19th century. Plates were used and reused by publishers over the course of many years and were transferred from one publisher to another with no, or very minor, changes. When a map is detached from its' atlas it becomes difficult to verify which atlas a map is from. Only by comparing it to known versions can conclusions be drawn. In this example, Greenleaf reissued an 1836 atlas of the same name by David Burr and at least 4 known versions were produced.