John Andrew Jackson Creswell was an American politician and abolitionist from Maryland, who served as United States Representative, United States Senator, and as Postmaster General of the United States appointed by President Ulysses S. Grant. Creswell is considered to be one of the ablest, if not the best, Postmaster General in United States history. Creswell modernized the U.S. Postal system to adapt to an expanding demand for increased postal routes throughout the Western states and remain competitive worldwide. Creswell also integrated the U.S. Postal system appointing both male and female African American postmasters throughout the United States, giving them significant positions of federal authority. Sweeping and constructive reforms of the U.S. Postal system took place during Creswell's tenure, including securing fair competition among Star Route carriages, and the abolishment of the franking system. Creswell developed a codified classification system of offenses against postal laws. Creswell streamlined and reduced postal costs making the United States Postal System run efficiently creating a fair pricing system domestically, and reducing international mailing prices. Creswell developed and implemented the United States first penny postcard.

Elkton is a town in and the county seat of Cecil County, Maryland, United States. The population was 15,443 at the 2010 census. It was formerly called Head of Elk because it sits at the head of navigation on the Elk River, which flows into the nearby Chesapeake Bay. The town constitutes part of the Delaware Valley.