[IULIANUS libro tertio ad Urseium Ferocem. ] §18.1.41.prCum ab eo, qui fundum alii obligatum habebat, quidam sic emptum rogasset, ut esset is sibi emptus, si eum liberasset, dummodo ante kalendas Iulias liberaret, quaesitum est, an utiliter agere possit ex empto in hoc, ut uenditor eum liberaret.
[JULIANUS, in the third book of Commentary on Urseius Ferox.] When someone had asked to buy from a person who had a tract of land mortgaged to another, in such a way that it should be bought for him if he had released it, provided that he released it before the Kalends of July, it was asked whether he could effectively bring an action on purchase to force the seller to release it.
respondit: uideamus, quid inter ementem et uendentem actum sit.
He answered: let us see what was intended between the buyer and the seller.
nam si id actum est, ut omni modo intra kalendas Iulias uenditor fundum liberaret, ex empto erit actio, ut liberet, nec sub condicione emptio facta intellegetur, ueluti si hoc modo emptor interrogauerit: 'erit mihi fundus emptus ita, ut eum intra kalendas Iulias liberes', uel 'ita ut eum intra kalendas a Titio redimas'. si uero sub condicione facta emptio est, non poterit agi, ut condicio impleatur.
For if it was intended that the seller should by all means release the land within the Kalends of July, there will be an action on purchase to force him to release it, and the purchase will not be understood to have been made under a condition; as if, for example, the buyer had asked in this manner: "The land shall be bought for me on the terms that you release it within the Kalends of July," or "on the terms that you buy it back from Titius within the Kalends." But if the purchase was made under a condition, no action can be brought to force the condition to be fulfilled.
§18.1.41.1Mensam argento coopertam mihi ignoranti pro solida uendidisti imprudens: nulla est emptio pecuniaque eo nomine data condicetur.
You, without knowing, sold to me, who was also ignorant, a table covered with silver as if it were of solid silver: the purchase is void, and the money paid under that name shall be recovered by condictio.