Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Lady Mary Dering (née Harvey) (bap. 3 September 1629 7 February 1704) was an English composer. She was daughter of Daniel Harvey of Combe, Croydon, Surrey, a turkey merchant in London (brother of Dr. William Harvey who first described blood circulation accurately) and his wife Elizabeth, daughter of Henry Kynnersley, also a London merchant. At school in 1640, at Hackney's "ladies university of the female arts", she began a friendship with Katherine Philips (the Matchless Orinda). Mary studied with Henry Lawes, who dedicated his book to her; in the dedication he highly praises her compositions, and says that few of any sex have matched their perfection.