Garran joked that the long work of the drafting committee breached the Factory Acts, the group (primarily Barton, Richard O'Connor, John Downer and Garran) often working late into the night preparing drafts for the convention to consider and debate the next morning. On the evening before the convention's last day, Barton had gone to bed exhausted in the small hours, Garran and Charles Gavan Duffy finishing the final schedule of amendments at breakfast time.[14] The convention concluded successfully, approving a final draft which would ultimately, aside from a small amendment arranged at the last minute in London, become the Constitution of Australia.