[IDEM libro quarto epistularum. ] §50.16.115.prQuaestio est, fundus a possessione uel agro uel praedio quid distet.
[THE SAME, in the fourth book of his Epistles.] The question is, how a 'tract of land' differs from a 'possession', or a 'field', or an 'estate'.
'fundus' est omne, quidquid solo tenetur.
A 'tract of land' is everything that is held by the soil.
'ager' est, si species fundi ad usum hominis comparatur.
A 'field' is when a species of tract of land is applied to human use.
'possessio' ab agro iuris proprietate distat: quidquid enim adprehendimus, cuius proprietas ad nos non pertinet aut nec potest pertinere, hoc possessionem appellamus: possessio ergo usus, ager proprietas loci est.
A 'possession' differs from a 'field' in the legal nature of ownership: for whatever we lay hold of, the ownership of which does not belong to us or cannot even belong to us, this we call a 'possession'. Therefore, possession is use, while a field is the ownership of the place.
'praedium' utriusque supra scriptae generale nomen est: nam et ager et possessio huius appellationis species sunt.
An 'estate' is the general name for both of those written above: for both a 'field' and a 'possession' are species of this designation.