Listening to a podcast of the BBC Radio 4 programme In our time, hosted by the excellent Melvyn Bragg about Foxe's book of Martyrs first published 1563. This is a book I'd only vaguely heard about. It contains illustrations of Christian martyrs in the act of being executed. My ears pricked up when one of the contributors started talking about Perotine Massey, a Guernsey woman burned, who gave birth during the awful procedure. The baby was tossed back into the flames too.
Just found these pictures of Guernsey burnings from the Book of Martyrs. Perotine is the top one. "A lamentable spectacle of three women, with a sely(?) infant brasting out of the Mothers Wombe, being first taken out of the fire, and cast in agayne, and so all burned together in the Isle of Garnesey. 1556 July 18."
Much more can be found on this matter here on this Guernsey Museums page.