[PAPINIANUS libro secundo responsorum. ] §6.1.48.prSumptus in praedium, quod alienum esse apparuit, a bona fide possessore facti neque ab eo qui praedium donauit neque a domino peti possunt, uerum exceptione doli posita per officium iudicis aequitatis ratione seruantur, scilicet si fructuum ante litem contestatam perceptorum summam excedant: etenim admissa compensatione superfluum sumptum meliore praedio facto dominus restituere cogitur.
[PAPINIANUS in the second book of Responses.] Expenses incurred by a bona fide possessor on land which has appeared to belong to another cannot be recovered either from the person who donated the land or from the owner, but are preserved through the office of the judge on grounds of equity by pleading an objection of fraud, that is to say, if they exceed the sum of the fruits gathered before the joinder of issue. For, once a set-off has been admitted, the owner is compelled to restore the excess expenditure, provided the land has been made better.