[1] He was the son of Hopton Haynes, assay master of the Royal Mint.
[2] He was admitted to Gray's Inn in 1720, and appointed tutor to James Cecil, 6th Earl of Salisbury.
[3] William Oldys wrote that he was invited to participate in the edition, but turned down the offer, because papers dealing with the young Princess Elizabeth were being censored.
Haynes produced one edited volume, Collection of State Papers relating to Affairs in the Reigns of Henry VIII, Edward VI, Mary, and Elizabeth, from 1542 to 1570.
Transcribed from the Original Letters and other Authentick Memorials left by W. Cecill, Lord Burghley, and now remaining at Hatfield House (1740).