[PAULUS libro tertio ad Sabinum. ] §33.5.4.prScyphi electione data si non omnibus scyphis exhibitis legatarius elegisset, integram ei optionem manere placet (nisi ex his dumtaxat eligere uoluisset, cum sciret et alios esse):
[PAULUS, on Sabinus, Book III] When the choice of cups has been given, if the legatee made his choice before all the cups were presented, it is held that his option remains unimpaired (unless he wished to choose from those only, although he knew that there were others as well).