The full report of Elders Orson Pratt and Joseph F. Smith, dated 17 September 1878 and addressed "President John Taylor and Council of the Twelve, Salt Lake City, Utah Territory," was published serially in the Deseret News (Salt Lake City). The portion containing the David Whitmer interview at Richmond, Missouri (7–8 September 1878) appeared in:
The full original text is freely accessible via Utah Digital Newspapers (J. Willard Marriott Library, University of Utah), with rights status "No Copyright - United States (NoC-US)."
Primary URL (Part 1, 27 Nov 1878): https://newspapers.lib.utah.edu/details?id=2651893
Continuation (Part 2, 4 Dec 1878): https://newspapers.lib.utah.edu/ark:/87278/s67668vj/2651950