“A Letter from Rev. Hosea Ballou to Rev. Dr. Lyman Beecher” by Hosea Ballou
The Ancient History of Universalism by Hosea Ballou
The Universalist Pulpit by Hosea Ballou and others
Note: Ballou’s sermon, The Author’s Ministry, written near the end of life, acts as a summation of his theological position and a capstone of his ministerial work.  He died shortly after writing this sermon at the age of 81.
Hosea Ballou: The Challenge to Orthodoxy by Ernest Cassara

 
“Unitarian Christianity” by William Ellery Channing
A Discourse Occasioned by the Death of Rev. Charles Follen by William Ellery Channing

“The Celestial Railroad” by Nathaniel Hawthorne
The Blithedale Romance by Nathaniel Hawthorne*

Free Audiobook of Walden
Walden by Henry David Thoreau*
“Walking” by Henry David Thoreau*
“Civil Disobedience” by Henry David Thoreau*

Nature by Ralph Waldo Emerson*
“The Harvard Divinity School Address” by Ralph Waldo Emerson*

Woman in the 19th Century by Margaret Fuller

“Slavery’s Pleasant Homes” by Lydia Maria Child
“An Appeal in Favor of that Class of Americans Called Africans” by Lydia Maria Child
“Letters from New York” by Lydia Maria Child

“On the Equality of the Sexes” by Judith Murray

“The Moral Initiative as Related to Women” by Julia Ward Howe
“Mother’s Day Proclamation” by Julia Ward Howe

“The Transient and the Permanent in Christianity” by Theodore Parker
Note: If anyone reads The Aesthetic Papers, it is in there as well under its original name.
“Theodore Parker and the Moral Universe” NPR

The Aesthetic Papers by Elizabeth Peabody
The Peabody Sisters by Megan Marshall*

Little Women by Louisa May Alcott*
Moods by Louisa May Alcott

The Dial volume 1 of particular interest are:
 The Editors to the Reader – Emerson and Fuller
 The Divine Presence in Nature and in the Soul – Parker
 Letter to a Theological Student – Ripley
 Orphic Sayings – Alcott
The Unitarian Movement in New England – William Dexter Wilson

Winchester Profession and other professions of faith