The Provincial Land Office of Maryland was responsible for distributing land from 1634 to 1777 on behalf of the Lord Proprietor. The Office's debt books list persons owning land, giving the names of the parcel(s) and the acreage of each tract that the person owned for each year rent was collected. They are arranged by county, by year, and then by the name of the person paying the rent. The great value of the Provincial Land Office debt books is that they enable the genealogist to track land ownership over various years in cases of intestate estates, land inherited by women, and land that is not specified in a will. They are now the basis of this series of record abstracts from Vernon L. Skinner. This is the fourth volume in a series covering the debt books of Charles County.