A looking-glass for all those called Protestants in these three nations : Wherein they may see, who are true Protestants, and who are degenerated and gone from the testimony and doctrine of the antient Protestants. And hereby it is made to appear, that the people, called in derision Quakers, are true (yea the truest) Protestants, because their testimony agreeth with the testimony of the antient Protestants in the most weighty things wherein the Lord called them forth in that day. Particularly, with the testimony and doctrine of William Tindal, who is called a worthy martyr, and principal teacher of the Church of England;faithfully collected out of his works. By George Keith.