In 1816 Cox mentioned the lockup at ‘Penryhn’, among a list of expenses. There appears little doubt that he was referring to the depot that was later referred to as Penrith. The name for the new depot, Penrhyn, may have simply been misinterpreted by others. Penrhyn was possibly named after the First Fleet ship that carried women convicts, the "Lady Penrhyn". There is no historical evidence to prove Macquarie's hand in naming the depot, especially considering he often endowed and recorded benefactors with that favour. Furthermore, Macquarie would have ensured that a plan of the town would have been drawn up. No documentary evidence has shed any light on Macquarie's reasoning for the placement of this depot and its connection with his vision for a township at Castlereagh.