 Despite this setback, Walker continued to play an active part in the development of the Australian Constitution.He had the name of the federal upper house changed from the "States Assembly" to the Senate, although his proposal that the federated colonies adopt the name "Commonwealth of Australasia", with a view to the future inclusion of New Guinea, New Zealand and Fiji, was not adopted.He also supported a minimum age for senators of twenty-five, rather than twenty-one, and voted for Paddy Glynn's proposal to include recognition of a "Divine Sovereign" in the Constitution.