Race and Religion: Hellenistic Theology: its Place in Christian Thought 1900
Universalism Asserted (1905) - J. W. Hanson recounts that this work started when Allin found a copy of Hosea Ballou's history of Universalism in the British Library and was led to a study of patristic literature.
rewritten by Mark T Chamberlain, "Every Knee Shall Bow", privately published.
In his activity as naturalist he had Isaac Carroll (1828–1880) as collaborator. His surveys resulted in The Flowering Plants and Ferns of the County Cork (1883)
^The Literary World; 1900 "Dr. Thomas Allin has explained this age-long religious strife between East and West as the outcome of deeper underlying ... Latinism went one way and Hellenism another, and the Catholic Church, one and indivisible, took divergent paths, ..."