Mullins was involved in the 1550 petition against the Catholic President of Magdalen, Owen Oglethorpe, one of ten signatories who included also Walter Bower, Michael Reninger and Arthur Saul.
[6] Mullins returned to England early in Elizabeth I's reign, and was appointed in 1559 canon of St Paul's Cathedral and archdeacon of London.
The historical issue once raised, Thomas Wood published A Brieff Discours off the Troubles Begonne at Franckford (1575, anonymous, attribution by Patrick Collinson).
It aimed to rebut the views of Mullins and John Young, and to reach back to the 1550s for precedents to the contemporary English debates.
[2] Mullins published a Greek poem in Carmina Latina et Graeca in Mortem duorum fratrum Suffolciensium, Henrici et Caroli Brandon, 1552.