 Each of these produced their own book of discipline, although each was based on the earlier disciplines of London Yearly Meeting.These were revised at various points according to changes in beliefs and practices of Friends over time.Conferences of Yearly Meetings in the later part of the nineteenth century, between the Guerneyite Yearly Meetings, who had accepted the Richmond Declaration of Faith, proposed formulating a "Uniform Discipline" for all the Guerneyite Yearly Meetings in the United States.