Some Roman doctors held it natural in every sense, even as opposed to supernatural (Medina)
Some teachers of the Roman Church, however, maintain that the righteousness and holiness which the whole Roman Church agrees was found in our first parents before sin was natural in every sense. It was natural, they say, not only as natural is distinguished from acquired or from what is against nature, but also as it is opposed to supernatural. That righteousness was not supernatural grace; it belonged to the natural state of man not yet corrupted, and was a condition owed to unfallen nature.
Medina bears witness to this on the Prima Secundae, question 18, article 2: "Some teachers understand by 'man placed in a purely natural state' man placed in unfallen nature, with a gift and strength that heals nature, so that he could remain in the good and in the practice of the virtues and persevere if he chose. This opinion is without doubt Augustine's."
These are the remarkably learned men who, as Bellarmine reports, think that Thomas himself held the same view along with the other more reputable authors, and that on this point they held the opposite of what Bellarmine himself teaches.
Latin
IV. Jam vero nonnulli sunt inter Doctores Ecclesiae Romanae, qui justitiam & sanctitatem illam, quae, fatente tota Ecclesia Romana, in primis parentibus ante peccatum reperiebatur, pertendant naturalem modis omnibus fuisse, & non solum quatenus naturale distinguitur ab adventitio, sive ab eo quod est contra naturam; sed etiam quatenus opponitur supernaturali. Nec enim justitiam illam fuisse gratiam supernaturalem, sed ad naturalem hominis nondum corrupti statum pertinuisse, & fuisse conditionem naturae integrae debitam. Id testatur Medina in 1. 2. quaest. 18. articulo 2. Intelligunt, inquit, Doctores quidam per hominem constitutum in puris naturalibus hominem constitutum in natura integra, cum dono & vigore sanante naturam, adeo ut in bono & officio virtutum posset permanere, & perseverare si vellet; Quae sententia sine dubio videtur esse Augustini. Et hi sunt viri illi insigniter eruditi, qui, teste Bellarmino, censent idem sensisse Thomam ipsum cum caeteris authoribus probatioribus, & eos hac in parte contrarium tenuisse ejus quod Bellarminus ipse docet.