Question: Who wrote a letter to Orville Browning where he recognized the importance of one of the four slave states that never declared a secession in the Civil War?
Sentence (from "Border states (American Civil War)"): Four others did not declare secession until after the Battle of Fort Sumter and were briefly considered to be border states: Arkansas, North Carolina, Tennessee, and Virginia—after this, they were less frequently called “border states”.
Relevant evidence: No