The Chamberlain controlled the provincial Exchequer located at Caernarfon.
With the final defeat of the Welsh Princes of Gwynedd in 1282, Edward I of England "annexed and united" North Wales to the English crown[1] although it did not become part of the Kingdom of England but was the king's personal fief.
The governance and constitutional position of the principality after its conquest was set out in the Statute of Rhuddlan of 1284.
The new administration comprised a number of royal officials appointed at the King's pleasure, including the Chamberlain of North Wales.
[2] The counties within his remit were Anglesey, Merionethshire, and Caernarfonshire and he accounted for the revenues of the provincial exchequer at Caernarfon to the Exchequer at Westminster.