Per "The Shipleys of Maryland" Ann/Agnes Shipley, who married George Harrison in 1783 n Baltimore County, MD, is a daughter of John Shipley. However, the book does not provide any source information for John Shipley's children and the information in the book is insufficient for a descendant to, for example, join the DAR. Does anyone know if there/where the source information for his children exists?

Thank you.