This unique historical and genealogical resource draws on the extraordinarily intact legislative, judicial, religious, and personal records of members of the first Maryland legislature. The two-volume set contains profiles of nearly fifteen hundred men who served in the state's legislature in the first 150 years after Maryland's founding.The major public and private aspects of each legislator's career are quickly discernible: family background, marriage, children, social status, religious affiliation, occupation, other offices held, and military service. Many entries include a brief summary of a legislator's stance on public and private issues. A final category, wealth at death, inventories the legislator's estate and notes any significant changes in wealth between first election and death.

The major part of this work is an alphabetically arranged and cross-indexed list of some 20,000 Maryland families with references to the sources and locations of the records in which they appear. In addition, there is a research record guide arranged by county and type of record, and it identifies all genealogical manuscripts, books, and articles known to exist up to 1940, when this book was first published. Included are church and county courthouse records, deeds, marriages, rent rolls, wills, land records, tombstone inscriptions, censuses, directories, and other data sources.