This volume continues the series, which contains detailed abstracts that begin at the point where the Maryland Calendar of Wills series ends. Abstracts give the names of all persons mentioned in the original will, including witnesses, names of tracts, acreage and situation, or means by which a property came into the possession of the testator. Will Book 10 (1816-1827; pages 1-82, 146-472), Will Book 11 (1827-1835; pages 1-343), Will Book 12 (1835-1854; pages 1-401), and Will Book 13 (1854-1867; pages 1-375) are covered. An index to full names and places adds to the value of this work.