April 1907
April – At 21 Fifth Ave, N.Y. Sam inscribed an aphorism in Vol. 1 of the Hillcrest Edition of his works to Julia Langdon Barber: “To be good is noble; but to show others how to be good is nobler—and less trouble. / Mark Twain / Mrs. A.L. Barber, May, 1907” [MTP].
Sam also inscribed in a copy of CS to Dorothy Butes: “For Dorothy, / with the affectionate regards of / The Author. / April/07” [MTP]. Note: See Apr. 22 for inscription of CS also to Butes, which suggests this also done that day.