Lot owners are divided into directional quadrants; northeasterly, northwesterly, etc. Each quadrant then lists the lots by number, given the owner's name in the year 1860.
Smith, Timothy H.
"1860 Fairfield Town Lot Owners,"
Adams County History: Vol. 19
, Article 5.
Available at: https://cupola.gettysburg.edu/ach/vol19/iss1/5