The research activity log (figure 1-11), used in conjunction with the timeline, is an efficient way to keep track of the origins of information provided on the family group sheet and in a chronological account. A well-kept research activity log will serve as a quick reference for sources of information, allowing you to see at a glance what work remains to be done The source numbers serve as a cross-reference to the sources used in entering information on the family group sheet and the timeline.