Sources include but are not limited to:

The Children of Henry VIII — Alison Weir

The Illustrated Encyclopedia of Royal Britain — Charles Phillips

The Kings and Queens of England and Scotland — Plantagenet Somerset Fry

The Lives of the Kings and Queens of England — Antonia Fraser

Oxford Illustrated History of the British Monarchy  — John Cannon and Ralph Griffiths

The Six Wives of Henry VIII — Alison Weir

The Life of Elizabeth I — Alison Weir

The Lady in the Tower — Alison Weir

Edward VI: The Lost King of England — Chris Skidmore

BBC History Magazine