Complex sentence: Dowall accepted Henry's position as Supreme Head in Earth of the Church of Ireland, but like Henry took a Catholic and anti-Protestant theological position; this became unsustainable in the reign of Edward VI, and in 1552 he withdrew to be replaced by Hugh Goodacre.
Split into simpler sentences: Dowall accepted Henry's position as Supreme Head on Earth of the Church of Ireland, but like Henry took an anti-Protestant theological position. This became unsustainable in the reign of Edward VI, and in 1552, he withdrew to be replaced by Hugh Goodacre.