This work was, for the most part, in what was done to raise the standard of knowledge of early Christian literature, and to make that knowledge accurate and scholarlike. He was, for a time, the Principal of the Theological College at Chichester, under Bishop Otter. He was also for a time Tutor at Oriel, and later, Vicar of St. Mary's. He was long bent on setting on foot some kind of Hall for poor students; and he took over from Mr. Newman the buildings at Littlemore, which he turned into a place for printing religious works. But though he was connected more or less closely with numberless schemes of Christian work in Oxford and out of it, his special work was that of a theological student. Marriott had much to do with the Library of the Fathers, with correcting translations, collating manuscripts, editing texts.[34] Somehow, the most interesting portions hardly came to his share; and what he did in the way of original writing, little as it was, causes regret that so much of his time was spent on the drudgery of editing. Some sermons, a little volume of _Thoughts on Private Devotion_, and another on the _Epistle to the Romans_, are nearly all that he has left of his own. Novelty of manner or thought in them there is none, still less anything brilliant or sharp in observation or style; but there is an undefinable sense, in their calm, severe pages, of a deep and serious mind dwelling on deep and very serious things. It is impossible not to wish that a man who could so write and impress people might have had the leisure to write more.