The Louisiana Research Collection is the home of the papers of George Washington Cable, author of the Grandissimes and Old Creole Days . Recently I received a reference question from a Mark Twain scholar, and had the opportunity to delve deep into Cable's papers. I found many interesting and delightful items along the way. The collection contains many fascinating letters between Mark Twain and George Washington Cable. Between late 1884 and early 1885, Cable and Twain embarked on a speaking tour together, and the two were billed as "the Twins of Genius". The George Washington Cable papers includes many letters from Twain to Cable. One of the more interesting letters from Twain I found was addressed to "my Dear Nephew", however it contained an envelope scrap showing Twain's return address and the outgoing address to Cable. The letter is dated January 15, 1883. I think what charmed me most was the quote Twain ended the letter with: "When an audience do no...