— Also termed jus duplicatum; dreit dreit.
“A complete title to lands, tenements, and hereditaments. For it is an ancient maxim of the law, that no title is completely good, unless the right of possession be joined with the right of property; which right is then denominated a double right, jus duplicatum, or droit droit. And when to this double right the actual possession is also united … then, and then only, is the title completely legal.” 2 William Blackstone, Commentaries on the Laws of England 199 (1766).