This work contains previously unpublished Revolutionary War records and consists chiefly of the names of those who subscribed to the Oath of Fidelity and Support from the early counties of Calvert, Frederick, Montgomery, and Washington. In addition, there is an extensive list of loyal civil servants of Prince George’s County-constables, surveyors, justices, grand jurors, etc. The data, embracing details on some 5,000 persons, derive from manuscript source records in both public and private collections and cannot be found elsewhere in print, neither in the Archives of Maryland nor in Brumbaugh’s own two-volume Maryland Records.