Abraham Bradley Jr.

As one of his many responsibilities as clerk to the postmaster general, Bradley began to compile information for a complete postal service map, including routes, stations, and distances between each. Handicapped by his lack of training in the fields of topography and cartography, Bradley utilized cartographic knowledge imparted in earlier maps by Robert Erskine and Thomas Hutchins.[7] When Postmaster General Pickering was succeeded by Joseph Habersham in 1795, Bradley's postal route maps and voluminous knowledge of the department made him an irreplaceable figure.

Bradley's first postal road map of 1796

In September 1796, Bradley published the first combined map of the post office stations, routes, and distances between. The map included a remarkable and innovative table that indicated times and days of the week to expect mail at various important postal coach stops along the primary eastern route. By this chart it could be determined that a letter posted in northernmost station at Brewer, Maine, could be expected to reach St. Marys, Georgia, in six weeks plus four days, 46 days of travel.[8] Bradley spent much of his career improving, expanding, and refining U.S. postal maps during the rapid westward expansion of America in the early 19th century. Appointed assistant postmaster general by Habersham in 1799, he would serve in the office until 1828.[7]

In 1800, the seat of U.S. government was transferred from urban Philadelphia to the newly surveyed, mostly rural District of Columbia. Under Habersham, Bradley was assigned the task of moving the General Post Office Department files and furniture to a location in the nation's new capital.[9] Bradley acquired a three-story house at the northeast corner of 9th and E streets NW, installed his family in the top floor, Habersham's and his own offices on the second story, and the clerks' offices on the ground level.[10]

Bradley found property rents and prices in Washington, D.C., unnecessarily high, roughly 500 houses scattered over a ten square mile tract, but believed the scale of the enterprise guaranteed the new capital's success.[10] Bradley invited his brother, Wilkes-Barre physician Phineas Bradley, to join him in bringing his family to the budding village, soon to be a thriving seat of government; Phineas became one of Washington's first town councilmen. In 1802, Bradley and his wife Hannah had a son they would name Joseph Habersham Bradley after the Georgia postmaster and family friend.[9]

Bradley's U.S. postal route map of 1804

As a Federalist, Bradley desired the re-election of John Adams in 1800;[11] the new president, Thomas Jefferson, appointed Gideon Granger to the office of postmaster general. Granger kept the sober and reliable Bradley as his assistant. By the time of the purchase of Louisiana in 1803, the old postal road map was vastly outdated, and with the assistance of British cartographer Aaron Arrowsmith, Bradley prepared a new map, published in 1804.[12] The 1804 map, produced in color, reflected the enormous changes the service and the country had undergone in the eight years between the two maps' creation. The Ohio Country and the Louisiana and Mississippi territories were well marked, and the postal routes of the new states of Kentucky and Tennessee fully developed. Like the original 1796 version, copies of this map were printed and distributed to be displayed in every large post office in the United States.[8]

Bradley continued to create maps during Postmaster General Granger's tenure, publishing a significant revision in 1810, but the War of 1812 made reliable mail delivery a much more hazardous enterprise. Return J. Meigs Jr., former governor of Ohio, was appointed to replace the retiring Granger in March 1814; again the incoming postmaster general kept the first assistant. As the wartime threat to Washington, D.C., grew, Bradley began looking for a farm away from the city where he and his wife could raise their children; in 1814 Bradley acquired a 218-acre (0.88 km²) farm in Montgomery County, Maryland near the tiny community of Chevy Chase. During the burning of Washington in 1814, many of the postal records and a few public officials were transferred for safety to the Bradley farmhouse, ten miles (16 km) north of the White House.[13]

Bradley's 1825 postal route map

In 1823, Meigs was in ill health, and was replaced by John McLean, also from Ohio. McLean, who was later to become an associate justice of the United States Supreme Court, proved an industrious and creative postmaster general. McLean, like his predecessors, kept Bradley as his chief assistant. Bradley and his brother Dr. Phineas Bradley managed an office of thirty postal clerks and serviced several thousand local post offices.

By 1825, the map Bradley had assembled included postal routes in the newly acquired states of Arkansas, Illinois, and Missouri, while still providing accurate cartographic information on areas such as Michigan, Minnesota, and Wisconsin territories. The completed map measured roughly four feet high and five feet wide, and included an inset map depicting the known extent of the North American continent.

In the election of 1828, Bradley and his brother supported the incumbent president, John Quincy Adams, but when Andrew Jackson was elected instead, Jackson partisans called for the ouster of Bradley. Jackson seems to have viewed the Bradley brothers as being corrupted by their high government salaries and their unique positions to decide the winners of lucrative mail contracts.[14] First Abraham, then brother Phineas were removed from their positions in 1829, months after Jackson's inauguration.[15]