This work consists of extensive alphabetical lists of Maryland and Delaware place names. Places listed in this gazetteer, one of many compiled by Gannett, include post villages, towns, counties, mountains, rivers, and other notable topographical features. Most places are identified in relation to a county and thereupon described in further detail.

In this second edition, Mr. Heinegg has assembled genealogical evidence on 390 Maryland and Delaware Black families (90 more than in the first edition) with copious documentation from the federal censuses of 1790 and 1810 and colonial sources consulted at the Maryland Hall of Records, county archives, and other repositories in Maryland and in Delaware.