In 1565 Mary Queen of Scots and Lord Darnley reviewed the state of the royal artillery. In November the Treasurer of Scotland was ordered to supply oak for various needs, and iron, and lead for bullets. The Treasurer was also to pay any outstanding gunner's wages. John Chisholm was to oversee the work restoring the guns. Chisholm was given £1000 Scots for other supplies. Mary wrote letters to the owners of woodlands for new timber to replace the worn-out and rotten mounts. Timber was cut at Kincardine, Aberuthven, Aberdalgie and Moncreiffe Hill and taken to the mouth of the Water of Earn. In April 1566 Chisholm was ordered to liaise with the Earl of Montrose and Lord Drummond to transport the timber to Edinburgh. The timber was shipped from the Tay to Leith and the Earl of Bothwell as Sheriff of Edinburgh was made to organise transporting the timber to Edinburgh Castle.