Addressees: New York World Editor
- Samuel L. Clemens to the Editor of the New York World, 14 and 16 February 1877 · Hartford, Conn · UCCL01406
- Samuel L. Clemens to the Editor of the New York World, 15 or 16 February 1877 · Hartford, Conn · UCCL12683
- Samuel L. Clemens to the Editor of the New York World, 22 February 1877 · Hartford, Conn · UCCL01408
- SLC to New York World editor, 22-26 November 1907 · New York, N.Y · UCCL07860
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