_Thank you_, Jillaine. William Dyer (II) and William (I) are my 8th and 9th great grandfathers respectively, and while of course I would love to find some connection to the Magna Carta, first and foremost I would like to know the truth!
I grew up hearing only about II's first wife, Quaker martyr Mary Dyer (I can remember at age 9 being present at the dedication of her statue in front of the Massachusetts State House) -- nothing at all about William. Very recently I read Beth Powning's very fine novel, "A Measure of Light" -- others interested in Mary and William might also appreciate it -- and learned a great deal more about both.
My thanks to WikiTree and specifically to anyone who has worked on their profiles; until I saw William II's, I did not even know he'd had a second wife.