Shields, Charles Woodruff. The Purely Instrumental Character of Ministerial Labor: A Discourse preached in the Second Presbyterian Church, Philadelphia; on the first Sabbath morning after the Installation Service of Friday evening, October 18, 1850. Philadelphia: J. W. Moore, 1851. First Edition. 
Removed, 8 x 5 inches, historical society & "withdrawn" stamps on the tp, 24 pp., foxing. Good. Pamphlet.
A sermon on I Cor. iii. 6, 7. The main point is that a minister is an instrument, not the cause, of God's blessings.
"The spiritual prosperity of a church depends exclusively upon the divine blessing."