Robert Walker directed his letter of resignation to Lewis Cass, Secreatry of State of the United States. This printed version of the letter was dated December 15, 1857 and was written in Washington, D. C. Walker indicated that he had accepted the appointment as governor on the expressed condition that the constitution (Lecompton) should be submitted to the people of Kansas Territory for a fair vote. He referred to several statements made in his inaugural address and that his resignation was based on the inability to follow through on principles expressed in that document.
Kansas Memory
Kansas Historical Society
Robert John Walker, letter resigning the Office of Governor of Kansas - p. 1