[2] William Welsh, a merchant, philanthropist, zealous Christian and community leader was a prominent member of the church from 1832 until his death in 1878.

In addition to superintending the Sunday school, Welsh authored, edited, and published several books and papers, as well as purchased and ran a newspaper.

Colonel James Ashworth raised a company from the men of St. Mark's and became a decorated Union Army officer, wounded eleven times during the Battle of Gettysburg alone.

During times of epidemic, the church served as a clinic, and 188 troops were raised from the parish to fight in the Civil War.

Over the years 39 members of this church have lost their lives on battlefields, foreign and domestic, in the service of the United States.

It is a perpendicular Gothic church with 56-foot ceilings crafted to resemble Noah's arc turned upside down.

It is constructed of Port Deposit granite and lined with Indiana limestone; the windows are an example of the work of Nicola D'Ascenzo, a former president of the Philadelphia Sketch Club.

Its formal dedication recital was in 1957, by Dr Alec Wyton (then organist-choirmaster of NYC's Cathedral of St John the Divine.

The church's case against him, his response, and his motion to stay (because of an impaneled federal grand jury) can be viewed by going to www.diopa.org and doing a site search for "clodfelter."