From the Journal of Belles Lettres, 1838, an anecdote about Henri François d’Aguesseau, three-time chancellor of France:

The chancellor, observing that his wife always delayed ten or twelve minutes before she came down to dinner, and being loth to lose so much precious time daily, commenced the composition of a work, which he prosecuted only whilst he was thus kept waiting. The result was, at the end of fifteen years, a book in three volumes quarto, which has gone through several editions, and is much esteemed.

D’Aguesseau seems to have been an industrious man — Voltaire called him “the most learned magistrate France ever possessed.”