Maryland's bishop, the Right Reverend
William Murray Stone ordained Pinkney to the diaconate on April 12, 1835, and to the priesthood the following year. Rev. Pinkney was initially assigned to Somerset and Coventry parishes on the Eastern Shore, but his health soon failed. He then became as rector of
St. Matthew's Episcopal Church in
Hyattsville, Maryland (formerly known as Addison's Chapel) and its
chapel of ease Zion Parish. During his leadership of those parishes, which lasted until 1857, Rev. Pinkney secured the rebuilding of both churches. St. Matthew's congregation moved to a larger Gothic-style frame building in
Bladensburg, Maryland, in 1844, which was consecrated in 1856.
St. John's Episcopal Church, Zion Parish (which had once been the lower chapel of that parish and burned down in 1845), was rebuilt and consecrated in 1856. After getting both congregations onto solid footings and declining a call from the
Church of the Epiphany (Washington, D.C.), Rev. Pinkney finally decided to move into Washington, D.C., and serve as rector of the
Church of the Ascension. During the
American Civil War, bishop
William Rollinson Whittingham, who had convinced Rev. Pinkney to accept the Ascension position just before the war, reprimanded the southern-sympathizing priest for failing to say prayers for President Lincoln, and instituted ecclesiastical proceedings against him (which failed). Rev. Pinkney served at Ascension 13 years, and after the war ended also served as assistant to Rt.Rev. Whittingham, whose Northern sympathies had caused considerable unpopularity. On April 24, 1883, he officiated the wedding of Donald McLean and
Emily Nelson Ritchie at
All Saints Church in
Frederick, Maryland. ==Episcopate==