In the late 1930s, the philosophy courses at SLU for young Jesuits in training were taught in Latin the class lectures, the assigned readings, and the tests were all in Latin, as were all the theology courses that Ong later took in the 1940s as part of his Jesuit training at SLU, but at a temporary location in Kansas. That temporary location endured for several decades.
As Ong was pursuing his graduate studies in philosophy, he also pursued a Master's degree in English at SLU. This brought him in contact with the bright and loquacious young Canadian Marshall McLuhan, a recent convert to Roman Catholicism who taught English at SLU from 1937 to 1944. However, one academic year McLuhan took a leave of absence from SLU and returned to Cambridge University to continue his research on his doctoral dissertation. His doctoral dissertation was a study of Thomas Nashe in connection with the learning of his time the learning of his time involving the verbal arts known as grammar, rhetoric, and dialectic (or logic). McLuhan completed his doctoral dissertation in 1943. In 2006 Gingko Press in California published McLuhan's unrevised dissertation as the book The Classical Trivium: The Place of Thomas Nashe in the Learning of His Time, edited by W. Terrence Gordon.
Because McLuhan was researching the learning of Nashe's time (roughly Shakespeare's time), McLuhan was alert to Perry Miller's then-new book The New England Mind: The Seventeenth Century (Harvard University Press, 1939). The English immigrants in Massachusetts Bay Colony had immigrated there from East Anglia, where a number of them had studied at CambridgeUniversity when the work of the French logician and educational reformer Peter Ramus (1515-1572) was being lionized there, as it continued to be in John Milton's time there as well. Perry Miller reports that he had found only one self-described Aristotelian in seventeenth-century New England everybody else was a Ramist.
McLuhan alerted Ong about Miller's book. Miller had done his best to understand and explain Ramus' work. But toward the end of his book he called for somebody to undertake a far more thorough study of Ramus' work and its European context. In the late 1940s, after Ong had completed his theological studies and had been ordained a priest, he advanced with three graduate degrees in hand to HarvardUniversity to undertake doctoral studies in English. Perry Miller served as the director of Ong's ambitious doctoral dissertation about Ramus and Ramism.
With the financial assistance of two Guggenheim Fellowships, Ong lived abroad for about four years researching his dissertation. By virtue of being a Jesuit, he was entitled to request to live in Jesuit residences, which put him on touch with local Jesuits who knew the areas where they lived. He worked in more than 100 libraries in the British Isles and Continental Europe tracking down the more than 750 volumes he lists and briefly describes in Ramus and Talon Inventory (Harvard University Press, 1958), which he dedicates to Marshall McLuhan.
Its companion volume is Ramus, Method, and the Decay of Dialogue: From the Art of Discourse to the Art of Reason (Harvard University Press, 1958). In 2004, the year after Ong's death, the University of Chicago Press reissued it in a paperback edition with a new foreword by Adrian Johns. In this book Ong works with the contrast of oral-aural and visual, a contrast with which he also works in many of the essays reprinted in his collection The Barbarian Within: And Other Fugitive Studies and Essays (Macmillan, 1962).