Awaiting transportation in Pentonville Prison, Agar arranged for his solicitor, Thomas Wontner, to use the £3,000 Agar had in his bank account, and give it to Pierce with instructions that it should be used to support Kay and their child. Pierce agreed, then reneged around mid-1856. Desperate for money, she went to see John Weatherhead, the governor of Newgate Prison, and told him that she knew who was involved in the SER bullion robbery. An investigation was undertaken at Cambridge Villa, and evidence found that corroborated her story, including the burnt floorboards, small specks of gold in the fireplace and under the floorboards, and evidence that the fireplace had been used at a very high temperature.