One slight caveat below: we believe that the Rev. Dr. Macartney was the Pastor of First Presbyterian, Pittsburg, rather than Arch Street Presbyterian, Philadelphia. Also, Dr. Macartney was commendably an old school Confessionalist like the Rev. Dr. J. Gresham Machen.
http://www.thisday.pcahistory.org/?p=632
This Day in Presbyterian History:
A Plea for Tolerance or a Plan for Liberal