Nicolas Errington (died 1593) was an English soldier, military engineer, and administrator. The surname was sometimes written Arrington or Aryngton, or Heryngton. Career Errington was a Captain based in the garrison at Berwick-upon-Tweed. He was involved in military operations in Scotland. He became Comptroller of Works at Berwick, and Muster Master, or Clerk of the Check of Musters, and was reckoned third in importance and command in Berwick. In 1566 he delivered an inventory of the artillery and stores in the north to William Cecil. The inventory includes guns and arms at Berwick, Wark, Norham, Lindisfarne, Newcastle Castle and the Queen's Manor, Tynemouth, Alnwick, and at Carlisle Castle and the Citadel. On 10 June Queen Elizabeth appointed him Clerk of the Ordnance, which displeased John Bennett, who had a similar role. Bennet was sick in July 1568 and Errington expected him to die. He advised Cecil to have the storehouses in Bennet's control secured from his wife and others, and offered to take on Bennett's responsibilities for only two shillings more pay weekly. He was a scout for the army raised against the Northern Rebellion from November to December 1569 and received wages of 4 shillings a day and 11 pence a day for two horsemen. On 19 December he was sent from Newcastle with letters to Regent Moray in Scotland. Marian Civil War In Scotland there was a civil war between the followers of Mary, Queen of Scots and the supporters of her son James VI. Errington was sent several times into Scotland. Mary, Queen of Scots was informed of his activities and wrote in March 1571 about the man named "Arrington" or "Harrington" who had been sent by Elizabeth I and the Earl of Sussex to see Regent Lennox. On 27 April 1572 Errington delivered a letter to Regent Mar for Lord Hunsdon about the rendition of the Earl of Northumberland. He described fighting on Edinburgh's Canongate, and the capture and execution of soldiers loyal to Mary, Queen of Scots, (at Cramond Bridge), who were going north to join with Adam Gordon of Auchindoun. Mary's supporters had failed to capture some strategic castles on the Forth including Barnbougle and Dundas. The Leith schoolmaster Mr Peter was deciphering captured messages. The Earl of Morton told Errington that he opposed the delivery of the Earl of Northumberland. Edinburgh Castle was held by William Kirkcaldy of Grange for Mary, Queen of