Br Rupert, in the combox, kindly posted a link to the Writings of Dominic Barberi and Ignatius Spencer. The site carries the text of Fr Spencer's own account of his conversion to the Catholic faith, written at the English College in Rome, in 1831.
Fr Spencer's cause for canonisation has passed the stage of the local tribunal and the papers are now with the Congregation for the Causes of Saints. Fr Spencer is related to the Princes William and harry through their mother, Princess Diana. In 1840, spencer visited Newman at Oxford. newman refused to meet him for dinner because, at that time, he considered him to be an apostate from the Church of England. (Newman was received into the Church in 1845.)
The writings of Bl Dominic Barberi posted here, his lamentation of England and his Letter to the Professors of the University of Oxford make interesting reading. Many thanks to Br Rupert and his colleagues for posting these items and I pray that they will, as desired, help to promote the causes of these two holy men who loved England.