Having been fully confirmed in protestantism by Dr. AEgidio, he preached boldly such doctrines only as were agreeable to gospel purity, and uncontaminated by the errors which had at various times crept into the Romish church. For these reasons he had many enemies among the Roman catholics, and some of them were fully determined on his destruction. A worthy gentleman named Scobaria, having erected a school for divinity lectures, appointed Dr. Constantine to be reader therein. He immediately undertook the task, and read lectures, by portions, on the Proverbs, Ecclesiastes, and Canticles; and was beginning to expound the book of Job, when he was seized by the inquisitors. Being brought to examination, he answered with such precaution that they could not find any explicit charge against him, but remained doubtful in what manner to proceed, when the following circumstances occurred to determine them. Dr. Constantine had deposited with a woman named Isabella Martin several books, which to him were very valuable, but which he knew, in the eyes of the inquisition, were exceptionable. This woman having been informed against as a protestant, was apprehended, and, after a small process, her goods were ordered to be confiscated. Previous, however, to the officers coming to her house, the woman's son had removed away several chests full of the most valuable articles; and among these were Dr. Constantine's books. A treacherous servant giving intelligence of this to the inquisitors, an officer was despatched to the son to demand the chests. The son, supposing the officer only came for Constantine's books, said, I know what you come for, and I will fetch them to you immediately. He then fetched Dr. Constantine's books and papers, when the officer was greatly surprised to find what he did not look for. He, however, told the young man, that he was glad these books and papers were produced, but nevertheless he must fulfil the end of his commission, which was, to carry him and the goods he had embezzled before the inquisitors, which he did accordingly; for the young man knew it would be in vain to expostulate, or resist, and therefore quietly submitted to his fate. The inquisitors being thus possessed of Constantine's books and writings, now found matter sufficient to form charges against him. When he was brought to a re-examination, they presented one of his papers, and asked him if he knew the hand writing! Perceiving it was his own, he guessed the whole matter, confessed the writing, and justified the doctrine it contained: saying, "In that, and all my other writings, I have never departed from the truth of the gospel, but have always kept in view the pure precepts of Christ, as he delivered them to mankind."