What is the importance of Oxford University in The Letters of J.R.R. Tolkien by J.R.R. Tolkien?

JRR Tolkien did his undergraduate work at Oxford University. It was and still is one of the most highly respected universities in all of England. In fact, it continues to be revered internationally as one of the world's greatest universities of the English-speaking world. It located in Southern England. In fact, it is named after the town in which it is located - Oxford, England. He lived and worked and taught at Oxford later in his life, after Leeds. Rather far into the book he points out to the recipient of one of his letters that there are plenty of local people who have no idea of who he is at all. As such he is able to experience literary fame alongside invisibility and he is mainly known locally as one of the university professors and married men - this is quite true.