Gilbert was secretary of the American Unitarian Association (1908–15).
His works include:
- The Christian Doctrine of Non-Resistance, by Adin Ballou and Leo Tolstoi (editor)
- The Indestructible Faith, 1916
- Thanksgiving: A Sermon, 1918
- Good photo (head-and-shoulders, at least 200×300 pixels)
- Date & place of birth & death
- Burial place
If you can help with any of these items, would you ?