Autograph letter signed ( Charles R ) to his nephew Prince Rupert ( Nepueu ), urging the Prince to prosecute the desyne of reli[e]ving Yorke and beating the Scots from which, he says, nothing must divert or slaken you, but direct impossibilities , one page, 8vo, addressed The King to P. Rupert and with instruction, 19th: instant brought hither on verso, folding creases, lower fold repaired, a few small holes with no loss to text, Burford, 17 June 1644 BEATING THE SCOTS - THE ROAD TO MARSTON MOOR. In early June 1644 Charles was forced to vacate his Oxford residence and march west through Yarnton, Long Hanborough and Burford, from where this letter was written, due to the increasing threat from the parliamentary army. The King touches upon this threat when he writes, the place where I am will cleerely show you the impossibility of my accepting of your proposition . In a rather vague manner, the King directs Rupert to prosecute the desyne of the relief of York yet leaves it in the Prince s hands to do as he chooses when it comes to aiding the Royal army, saying: but for the assisting of me or my Army, I leave you to doe therein, as you shall judge most for my service Twelve days after this letter was written Charles would lead his army to a victory at the Battle of Cropredy Bridge. The letter shows his preoccupation in the lead up to this, leaving the situation in the north in Rupert s hands. Following the King s victory, Rupert, on 2nd July 1644, led the Royalist soldiers in the north to a heavy defeat at Marston Moor in what some believe was the beginning of the end for the Royalist campaign.