Placaeus: the power of not dying was as natural to Adam as the power of not sinning
Josué de la Place says the same in the thesis already cited: "The power of not dying was as natural to Adam as the power of not sinning. The reign of death is no more from nature than the reign of sin. He had the possibility of dying from nature, but the necessity of dying from sin."
He gives this reason: it is fitting that the physical powers follow the condition of the moral powers, which rule in man. From this he concludes that in Adam life and righteousness stood on the same footing, and so, since righteousness was natural to him, the power of not dying must have been natural too.
Latin
XXIV. Sic etiam ea de re pronunciat Josue Placeus thesi jam allegata. Tam naturalis, inquit, erat Adamo facultas non moriendi, quam non peccandi. Haud magis est a natura mortis quam peccati imperium. Possibilitatem quidem moriendi a natura habuit, necessitatem vero a peccato. Cujus rei hanc rationem affert, quod aequum sit facultates Physicas sequi conditionem Moralium, penes quas est imperium in homine: Unde colligit in Adamo eandem fuisse rationem vitae & justitiae. Ac proinde cum justitia ipsi fuerit naturalis, naturalem quoque esse debuisse non moriendi facultatem.