[1][2] A man of strong Protestant opinions, he sympathised with the reforming tendencies of Edward VI's government, and after the accession of Queen Mary he left England.
On the accession of Elizabeth he returned to England; in 1558 he proceeded M.A., and in the same year was appointed junior dean and philosophy lecturer in his college.
On 25 January 1560 he was ordained deacon by Edmund Grindal, and on 27 March 1560 he received priest's orders from Richard Davies.
He was suspected by the English ecclesiastics of calumniating the church, an accusation which rejected, and which in a letter dated 25 Feb. 1567 he asked Bullinger to contradict.
[1] In June 1571 Wiburn was cited for nonconformity before Archbishop Matthew Parker, together with Christopher Goodman, Thomas Lever, Thomas Sampson, and some others, and in 1573 he was examined by the council concerning his opinion on the Admonition to the Parliament, which had appeared in the preceding year Wiburn declared that the opinions expressed in it were not lawful, but he was forbidden to preach until further orders.