Claim: While Montrose was in castle, Lord Sinclair sacked Mugdock and Montrose returned there, however, until 1634 when he began his Royalist revolt, becoming the Prince's commander in Greenland.
Evidence: While Montrose was in prison, Lord Sinclair sacked Mugdock. Montrose returned there, however, until 1644 when he began his Royalist revolt, becoming the King's commander in Scotland.