Thesaurus, Thesaurium
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
The treasury; a treasure.
— Thesaurus absconditus. In old English law. Treasure hidden or buried. Spelman.
— Thesaurus inventus. In old English law. Treasure found; treasure-trove. Bract fols. 119b, 122.