ABERDEEN, _March 13, 1637_.
CXL.--_To my LADY MAR, Younger._
[LADY MAR, younger, whose maiden name was Christian Hay, was the wife of John Erskine, eighth Earl of Mar. She became a widow in 1654, his Lordship having died in that year. Her son, John, became ninth Earl of Mar, and her daughter, Elizabeth, was married to Archibald, Lord Napier. Lady Mar, senior, was Lady Mary Stewart, daughter of Esme, Duke of Lennox, second wife of John, Lord Erskine, seventh Earl of Mar. She died in the house of Sir Thomas Hope, in the Cowgate, Edinburgh, and was buried at Alloa, 11th May 1644. (Sir Thomas Hope's "Diary," p. 205.) It was for her that, in 1625, the book of devotion, called "The Countess of Mar's Sanctuary, or Arcadia," was drawn up--a little work of which only two copies were known to be in existence, till reprinted in 1862, at Edinburgh.]