because you are going away and he wants her to hear directly from him; I guess, too, it's because he's being exercised in his mind and thinks he ought to have written oftener before; she says her hand is out of practice and the Cap'n hates to write letters and only writes business letters when it's a force put.
Offers possible answers to the armchair philosopher's favorite question: "Why?"
Answers are from Project Gutenberg.
CW: Questionable gender/racial attitudes.
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