The following is quoted from Library of Congress's "Manuscripts" section
"Theodore Roosevelt was a devoted father, who regularly wrote to his children when the family was apart. In this letter from ca. 1890 [the image above - emon], the future president entertains his young son Theodore with an illustrated fable about a wolf attacking a calf and about other barnyard animals rallying to drive the predator away. In addition to President Roosevelt's papers, the division holds the papers of three of his children: Theodore Roosevelt, Jr.; Kermit Roosevelt; and Alice Roosevelt Longworth. (Theodore Roosevelt, Jr., Papers)"