It details part of an ongoing conversation between Thomas Cranmer - Archbishop and architect of the English Reformation - and John Calvin - famous for inventing Calvinism, which is not really true - concerning a 'godly synod' intended to oppose the Roman Catholic Council of Trent.
Here is the quotation (from Cranmer to Calvin):
"As nothing is more destructive to the church than heresies and disputes respecting the doctrines of religion, so nothing is more efficacious in gathering together the churches of God, or more powerfully strengthens the flock of Christ, than the uncorrupted doctrine of the gospel and agreement in opinion. Wherefore I have often desired, and still do desire, that learned and pious men who pass others in learning and judgment, should meet in some place free from danger, where by mutual deliberations and comparison of their opinions, they might consider all the points of ecclesiastical doctrine, so that by weighty authority they might hand down to posterity a work, not only rightly setting forth the doctrines themselves, but also the manner in which they should be expressed. Our adversaries now hold a council at Trent, endeavouring to establish errors, and shall we neglect to hold a godly synod, in which we may refute errors, correct erroneous doctrines, and set forth those things which are true? I am told that they are constructing decrees respecting the worship of the bread — surely we ought to use every means possible, not only to fortify others against this idolatry, but also that we ourselves may agree in doctrine respecting this sacrament. You must be well aware how much the dissensions and varieties of opinions respecting this sacrament of unity, have undermined and shaken the church of God. Although in some places these dissensions now no longer exist, yet I would wish for agreement concerning this doctrine, not only as to the matter itself, but also as to the words and manner of expression. I have now stated my desire, which I have also communicated to Melancthon and to Bullinger, and I entreat you to consider amongst yourselves in what manner such a synod may best be assembled. Farewell. From Lambeth, 20th March, 1552."Your most beloved brother in Christ, Tm Cantuar."
 Cranmer, Thomas. Writings of the Rev. Dr. Thomas Cranmer, Archbishop of Canterbury and Martyr, 1556. Philadelphia: Presbyterian Board of Publication, 1842.