In Bureau of Land Management records
What does the abbreviation F.C. mean? It is usually in the "To Whom Patented" column, followed by a date. Do we record that date since it is the most recent in that entry?
In other entries the date relinquished is more recent than the sold date, so is that the date we should index?
My batch is US—Bureau of Land Management Tract Books, 1800–1955 [Part C][M3FT-QK1]