On attempting to re-enter Stirling after the fight he was apprehended and thrown into prison, where he lay until in July following he was removed with a number of other prisoners to Edinburgh, and confined in the Greyfriars churchyard. Here in a small walled-in piece of ground nearly fifteen hundred prisoners were strictly warded, most of whom had been taken after the battle of Bothwell, and among these Garnock exerted himself to prevent them taking the 'test.'