These biographical sketches appeared in The Australian Christian almost seventy five years ago. The articles were published in book form in 1938. The author, Thomas Hagger, wrote down interesting and important material as he honored these noble pioneers of the Restoration Movement in Australia. He knew well both the men and the movement. He preached the faith and promoted the union of Christians. Hence the title, Heralds of Christian Unity.

The chapters in the book include sketches on:
Campbell, Thomas
Campbell, Alexander
Stone, Barton Warren
Scott, Walter
Smith, John
Franklin, Benjamin
Davies Family and the Church at Cam-yr-Alyn
Coop, Timothy
Wallis, James
King, David
Rotherham, Joseph Bryant
Earl, Henry Samuel
Gore, Thomas Jefferson
Carr, Oliver Anderson
Moysey, George Bickford
Cheek, Stephen
Ewers, David Amos
Maston, Aaron Burr
The Plea of Churches of Christ