Eugene Perkins, "Our First Progenitors on American Shores: The Three Richards: Richard I, Richard II, Richard III, and their Families - Maryland Beginnings," unpublished paper, in possession of Nathan W. Murphy, quoting Gust Skordas and Morris L. Radoff, The Early Settlers of Maryland: An Index to Names of Immigrants Compiled from Records of Land Patents, 1633-1680 (Baltimore: Genealogical Publishing Co., 1968); also quoting Sarah G. Sitz, Some Descendants of Richard and Mary Perkins of Baltimore County, Maryland (Manhattan, Kansas: n.p., 1989); also quoting "Parkins and Perkins Surname Y DNA Study Project;" also quoting Maryland Hall of Records, Patents, 22:111; also quoting Maryland Hall of Records, Land Records, RM#HS:62; also quoting Maryland Hall of Records, Patents IB & IL#C:165-166; also quoting Maryland Probate Records, Prerogative Court Abstracts, 1679-1686, (Libers 6, 7a, 7b, 8), 23, 51, 80, 1685-1701 (Libers 9, 10, 10c, 11a, 11b), 27, 42, 76, 1688-1698 (Liber 12, 13a, 13b, 14, 15), 13, 44, 55, 67, 1679-1704 (Libers 20-24), 58, 1699-1707 (Libers 25-28), 14; also quoting John David Davis, Baltimore County, Maryland, Deed Records, 1659-1737 (Bowie, Maryland: Heritage Books, Inc., 1996); also quoting St. George Parish Register, Baltimore County, Maryland, Microfilm, Family History Library, Salt Lake City, Utah; also quoting Maryland Hall of Records, Patents, 22:111 and Patents IB & IL#C: 165-166; also quoting Maryland Hall of Records, Rent Rolls, 2:325A; also quoting Maryland Hall of Records, Patents, CC#4:20-21; also quoting Maryland Hall of Records, Rent Rolls, 2:300 A&B; also quoting Maryland Historical Magazine, 1924, 19:365-366; also quoting Maryland Hall of Records, Land Records, IR#AM: 19, 20; also quoting Maryland Hall of Records, Land Records, HW@2:217-220; also quoting Maryland Hall of Records, Land Records, TR#DS: 279-281; also quoting Maryland Genealogical Notes, Early Parishes and Hundreds, Baltimore, Maryland (Baltimore, Maryland: Ida & Charles Wilkins Foundation); also quoting Raymond B. and Sarah Seth Clark, Baltimore County, Maryland, Tax List, 1699-1706 (n.p.: Washington, D.C., 1964); also quoting Robert W. Barnes, Baltimore County Families, 1659-1759 (Baltimore, Maryland: Genealogical Publishing Co., Inc., 1989), 501; also quoting Annie Walker Burns Bell, Maryland Indices to Testamentary Proceedings, Probate Wills, and Administration of Estates, Annapolis, Maryland, 1557-1794, 16:172, 20:78-81, 19:21; also quoting Maryland Hall of Records, Patents, IL, 4:690 and Rent Rolls, 2:535A; also quoting Maryland Hall of Records, Inventories, 1:117-118; Inventories & Accounts, 25:310-311; also quoting Maryland Hall of Records, Administrative Accounts, 2:93; also quoting Maryland Probate Records, Prerogative Court Abstracts, 1699-1703 (Libers 28-28), 75.