Ex diuturnitate temporis
Ex diuturnitate temporis, amnia praesumuntur solemniter esse acta. From length of time, all things are presumed to have been done in due form. Co. Litt. 6; 1 Greenl. Ev. Sec. 20.
A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.