‘He ordered the messenger to continue to the banks of the above-mentioned river Clyde with a fishhook, and to cast the hook into the stream and bring back to him immediately the first fish that was baited and drawn out from the waters. The messenger fulfilled what the saint said and delivered into the presence of the man of God the fish he had captured, which is commonly called a salmon. Kentigern requested that the fish before him be cut and gutted, and he discovered the above-mentioned ring in it. And at once he sent it to the queen by that same messenger. When she saw it and took it back, her heart was filled with joy and her mouth with exaltation and thanksgiving. Her grief turned into joy and the expectation of death into the festivities of praise and deliverance. Therefore, the queen rushed into the midst of everyone’s eyes and returned the ring that had been sought by the king.’

From ‘The Life of Kentigern’, by Jocelyn, a monk of Furness (12th century)
Translation by Cynthia Whiddon Green

http://legacy.fordham.edu/halsall/basis/Jocelyn-LifeofKentigern.asp