She wishes you to give her a legal promise of marriage, and sustentation.
"The Memoires of Casanova, Complete The Rare Unabridged London Edition Of 1894, plus An Unpublished Chapter of History, By Arthur Symons"
Jacques Casanova de Seingalt
The king shall provide, when any happen to fail of his wit, as there are many having lucid intervals, that their lands and tenements shall be safely kept without waste and destruction, and that they and their household shall live and be maintained completely from the issues of the same; and the residue beyond their reasonable sustentation shall be kept to their use, to be delivered unto them when they recover their right mind; so that such lands and tenements shall in no wise within the time aforesaid be aliened; nor shall the king take anything to his own use.
"Chapters in the History of the Insane in the British Isles"
Daniel Hack Tuke
Ideals act for good as well as for evil; if they cramp all progress, they nevertheless tend to the sustentation of a certain level of thought.
"The Soul of a People"
H. Fielding