Amenable to discipline, diligent in his studies, and talented, he made rapid progress, and while still a student was appointed to give lectures in philosophy.

[2] He was ready to condemn all violent efforts for reform, and had no hesitation in denouncing not only all secret societies in Ireland, but also "our American fellow-subjects, seduced by specious notions of liberty".

In a pastoral read in all the churches, he spoke of the clerical organisers of the rebellion as "vile prevaricators and apostates from religion, loyalty, honour, and decorum, degrading their sacred character, and the most criminal and detestable of rebellious and seditious culprits".

[5] In April 1815, Archbishop Troy laid the foundation of St Mary's Pro-Cathedral in Marlborough Street, Dublin, but did not live to see it completed.

He died in Dublin very poor, leaving scarce sufficient to pay for his burial, and was interred in the unfinished St Mary's Pro-Cathedral.

Although his cordial relations with the government exposed him to many suspicions and accusations, there is no ground for questioning the integrity of his motives and conduct, which were inspired by his views of the interest of his church.

[4] John D'Alton, speaks of Troy as "a truly learned and zealous pastor, … a lover and promoter of the most pure Christian morality, vigilant in the discharge of his duty, and devotedly solicitous not only for the spiritual good of those consigned to his charge, but also for the public quiet of the state".