Principiis obsta. Oppose beginnings. Branch, Princ. Principiorum non est ratio. There is no reason- ing of principles. 2 Bulstr. 239. See PRINCIPLES Principium est potissima pars cujusque rei. The beginning is the most powerful part of a thing. 10 Co. 49. Prior tempore, potior jure. He who is first in time is preferred in right. Co. Litt. 14 a; Broom, Max. 354; 2 P. Wms. 491; 1 Term 733; 9 Wheat, App. 24; 15 Atl. Rep. (Pa.) 730. Privatio præsupponit habitum. A deprivation presupposes a possession. 2 Rolle 419. Privatis pactionibus non dubium est non lædi jus cæterorum. There is no doubt that the rights of others cannot be prejudiced by private agreements. Dig. 2. 15. 3. pr.; Broom, Max. 697. Privatorum, conventio juri publico non derogat. Private agreements cannot derogate from public law. Dig. 50. 17. 45. 1: Broom, Max. 695. Privatum commodum publico cedit. yields to public good. Jenk. Cent. 273. Private Privatum incommodum publico bono pensatur. Private inconvenience is made up for by publie good. Broom, Max. 7. Privilegium est beneficium personale et extin guitur cum persona. A privilege is a personal benefit and dies with the person. 3 Bulstr. &. Privilegium est quasi privata lez. A privilege is, as it were, a private law. 2 Bulstr. 189. Privilegium non valet contra rempublicam. A privilege avails not against the commonwealth. Bacon, Max. 25; Broom, Max. 18; Noy, Max., 9th ed. 34. Pro possessione præsumitur de jure. From pos session an arises a presumption of law. See Pos-