peculium

noun

1. (historical)The savings of a son or a slave, with the father's or master's consent; a little property or stock of one's own.
2. A special fund for private and personal uses.

   “Still, however, he gained something, and it was the glory of his heart to carry it to Mr MacMorlan weekly, a slight peculium only subtracted, to supply his snuff-box and tobacco-pouch.”