Charles was escorted from the battle field to Gorthleck House, where he met Lovat, who advised him to regroup in the hills. The next morning they went their separate ways; Lovat was rowed across Loch Ness but his escape was hampered by a combination of gout and arthritis which meant he had to be carried on a litter. In the aftermath of Culloden, Prince William, Duke of Cumberland realised that the British Army did not have a good map of the Scottish Highlands to locate Jacobite dissenters such as Simon Fraser, so that they could be put on trial. This led to the formation of Ordnance Survey. During the post-Culloden search for Jacobites, John Ferguson, commander of the Royal Navy vessel "Furnace", received information Lovat was hiding on the island of Loch Morar, where he was arrested on 7 June.