In parts of New England, they are known as “shire towns.” Most of us know them as “county seats.” In the United States, counties administer state or provincial law at the local level as part of the decentralization of state authority. So a county is an administrative division of a state which has no sovereign jurisdiction of its own. The county seat is an administrative center for that county.
From Wikipedia: "Prince Frederick has served as the county seat of Calvert County since 1722 when officials chose a plot of land known as Williams’ Old Field as the spot for the new county courthouse. The original courthouse was completed in 1732. During the War of 1812, Commodore Joshua Barney’s Chesapeake Bay Flotilla found refuge from the advancing British in St. Leonard’s Creek. While laying siege to Barney’s flotilla, the British plundered and destroyed the area nearby; their destruction included burning the town of Prince Frederick. In 1882, Prince Frederick burned a second time when a massive fire destroyed virtually the entire town and its courthouse. A new courthouse was erected on the same spot and remains the center of Calvert County’s government to this day."
There is a statue that stands at the posted coordinates which honors the fallen sons of the War To End All Wars. At the base, on the front, of the memorial is a date. You will use this date to calculate the cache's hiding spot.
For the decimal minutes of the latitude: SUBTRACT 1017 from the date.
For the decimal minutes of the longitude: SUBTRACT 1051 from the date.
Before heading off to the final you should look for the benchmark disc K 133. It is only about 60 feet behind you as you face the courthouse. Finding it will help you qualify for Surveyors' Delight: A Challenge Cache (GC4XBY2).
You can check your answers for this puzzle at: Am I headed to the right place?
Oh yeah, one more thing: before racing off to find the final for this cache, you just might want to gather the final coordinates for the multi-cache Prince Frederick Multi (GC4XDM9) first. Just saying.