I have known a great deal of the trouble of annuities; for my mother was clogged with the payment of three to old superannuated servants by my father’s will, and it is amazing how disagreeable she found it.
There are no more uses of "superannuation" in the book.
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Bedeviled as they may have been at times by the dilemma of surplus population, the traditional slaveholders of the Western world were under Christian constraint to avoid anything resembling a "final solution" to solve the problem of excess labor; one could not shoot an expensively unproductive slave; one suffered with Old Sam when he grew superannuated and feeble, and let him die in peace.
William Styron -- Sophie’s Choice
The talk of setting aside a corner of the pasture for superannuated animals had long since been dropped.