The author’s fourth book on Harford County, Maryland, marriages covers 1861 through 1870. Marriage and family relationships have been gleaned from a number of sources including license books, marriage certificates, probate records, court records, divorce cases, newspaper articles, tombstone inscriptions, church registers, Bible records, census records, obituaries, death certificates, military records, some family histories and secondary sources, plus information researched by others whose names have been credited and cited within the text. This book is much more than just a listing of names and dates. In many instances, the readers will find complete dates of birth and death, full names of parents, children, siblings, other relationships, ministers, places of residence and migration, occupations, military ranks, subsequent marriages, children’s marriages, nicknames, and more. Marriages have also been noted for some persons who resided in other states and counties, and even other countries, that had a connection to Harford County. In many cases there is ample information about family relationships to enable researchers to establish family lineages for three generations, thus carrying the members of some branches well into the 20th century.