- Agnosticism, what then? by C. N Campbell, 1905
- From agnosticism to belief: A series of Lenten conferences, delivered in Holy Trinity Church, Bloomington, Ill by Patrick Dillon, 1909
- The confession of agnosticism by G. M McC., 1888
- Frazer prize essays on agnosticism from a moral and spiritual point of view by H. T Burgess, 1888
- NATURALISM AND AGNOSTICISM the Gifford Lectures Delivered Before the University of Aberdeen, 1896-1898 by James Ward, 1898
- Modern agnosticism: A thesis by J. Berg Esenwein, 1896
- The reality of God, and Religion & agnosticism;: Being the literary remains of Baron Friedrich von Hugel by Friedrich Hugel, 1931
- From agnosticism to belief by Patrick Dillon, 1908
- Facts and fallacies of agnosticism: Lecture delivered by K.Kohler by Kaufmann Kohler, 1888
- Stepping-stones to agnosticism by Frederick James Goulg, 1890
- Agnosticism: Sermons preached in St. Peter's, Cranley gardens, 1883-4 by Alfred Williams Momerie, 1891
- Why I am an agnostic: Being a manual of agnosticism by William Stewart Ross, 1889
- A protest against agnosticism;: The rationale or philosophy of belief by P. F Fitzgerald, 1890
- Agnosticism by J. Gregory Smith, 1896
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