Bachelor, University Texas, Austin, 1972; Master of Library Science, University Texas, Austin, 1974.
Research associate, Humanities Research Center University Texas, Austin, 1973-1976;
research library, Humanities Research Center University Texas, Austin, 1976-1983;
executive director, Rosenbach Museum and Library, Philadelphia, 1983-1992;
president, American Antiquarian Society, Worcester, Massachusetts, since 1992. Board directors Research Libraries Group, Inc., Mountain View, California. Director 18th Century Short Title Catalogue/North America, since 1992.
Corporator Alliance for Education, Worcester, Massachusetts, since 1993.
Director Worcester Municipal Research Bureau, since 1993. Member finance committee Town of West Boylston, since 1997, chairman, 2001—2005. Board director Greater Worcester Community Foundation, since 2004, clerk, since 2005.
Board director Massachusetts Foundation for Humanities, 1996—2004, president, 2002—2004. Board director Rare Books School University Virginia, since 1994. Member American Antiquarian Society, Massachusetts History Society, Colonial Society Massachusetts, Grolier Club (New York City), Worcester Club.
Married Arthur H. Dunlap, Junior, December 27, 1972 (deceased 1977). Married Frank Armstrong, May 11, 1979. 1 child, Libbie Sarah.