immemorial possession

from Bouvier's Law Dictionary, Revised 6th Ed (1856)
IMMEMORIAL POSSESSION. In Louisiana, by this term is understood that of 
which no man living has seen the beginning, and the existence of which he 
has learned from his elders. Civ. Code of Lo. art. 762; 2 M. R. 214; 7 L. R. 
46; 3 Toull. p. 410; Poth. Contr. de Societe, n. 244; 3 Bouv. Inst. n. 3069, 
note. 
    

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