Robert Henry Brodie, Dictionary of National Biography… (1887)
“ On the 9th, the day of the battle, ‘the captain of the left wing was old Sir Marmaduke Constable, and with him was Master William Percy, his son-in-law, William Constable, his brother, Sir Robert Constable, Marmaduke Constable, William Constable, his sons, and Sir John Constable of Holderness, with divers his kinsmen, allies, and other gentlemen of Yorkshire and Northumberland’ (contemporary news-letter printed by Ric. Fawkes; reprint, Garret, 1822) . ”
