1. Johnson F. R., Astronomical thought in Renaissance England (Baltimore, 1937), 126–8. Wren's copy of Recorde's Castle is in the Bodleian Library, shelfmark Savile K.5(3).
2. Peter Langtoft's Chronicle, ed. Hearne T. (Oxford, 1725), i, cxlvii–cxlviii.
3. Parentalia: Or, memoirs of the family of the Wrens (London, 1750), 206.