[IDEM libro quarto stipulationum. ] §45.1.138.prEum, qui certarum nundinarum diebus dari stipuletur, primo die petere posse Sabinus ait: Proculus autem et ceteri diuersae scholae auctores, quamdiu uel exiguum tempus ex nundinarum spatio superesset, peti posse existimant.
[The same, Stipulations, book 4.] Sabinus says that he who stipulates for something to be given on the days of a certain market can demand it on the first day; but Proculus and the other authorities of the opposite school think that it can be demanded as long as even a small amount of time from the duration of the market remains.
sed ego cum Proculo sentio.
But I agree with Proculus.
§45.1.138.1Cum pure stipulatus sum illud aut illud dari, licebit tibi, quotiens uoles, mutare uoluntatem in eo quod praestaturus sis, quia diuersa causa est uoluntatis expressae et eius quae inest.
When I have unconditionally stipulated for either this or that to be given, you will be permitted, as often as you wish, to change your mind regarding what you are going to perform, because the case of an expressed will is different from that which is implied.