""A Letter to the Reverend William E. Channing, on the Subject of His Letter to the Reverend Samuel C. Thatcher (1815)"" is a book written by Samuel Worcester. The book is a response to a letter written by William E. Channing to Samuel C. Thatcher. Worcester's letter addresses the theological and religious differences between Channing and Thatcher, and seeks to clarify some of the points made in Channing's letter. The book is an important document...