
On 10 March 560, St Kessog, the Irish missionary in the Lennox area and southern Perthshire, was killed.
Kessog was Scotland's patron saint before Andrew, and his name was used as a battle cry by the Scots. Son of the king of Cashel in Ireland, St Kessog is said to have worked miracles, even as a child. He left Ireland and became a missionary bishop in Scotland. Using Monks' Island in Loch Lomond as his headquarters, he evangelized the surrounding area until he was martyred, supposedly at Bandry, where a heap of stones was known as St Kessog's Cairn.


