[IDEM libro tertio disputationum. ] §18.1.37.prSi quis fundum iure hereditario sibi delatum ita uendidisset: 'erit tibi emptus tanti, quanti a testatore emptus est', mox inueniatur non emptus, sed donatus testatori, uidetur quasi sine pretio facta uenditio, ideoque similis erit sub condicione factae uenditioni, quae nulla est, si condicio defecerit.
[THE SAME, in the third book of Disputations.] If someone has sold a tract of land devolved upon him by hereditary right in this way: 'It shall be purchased by you for as much as it was purchased by the testator,' and it is soon after discovered that it was not purchased, but given as a gift to the testator, the sale is deemed as made, as it were, without a price, and therefore it will be similar to a sale made under a condition, which is null if the condition fails.