From Baltimore: Its History and Its People, Vol. III p. 795:
May have been born 18 September 1773
Frances Thwaites Willis Born Sep. 18, 1763 Died Feb. 8, 1845
Frances married Edward Talbott, son of Edward Talbott of West River and Temperance Merryman, on 16 Sep 1795. (Edward Talbott was born on 26 Jun 1764 in "Barrett's Delight", Baltimore Co., Maryland, (United States), died on 5 Aug 1801 and was buried in Talbott Family Burial Ground, Baltimore Co., Maryland, (United States).)
Source: Baltimore: Its History and Its People by various contributors, Lewis Historical Publishing Co., New York, 1912, Vol. III p. 795 (from http://books.google.com).
Frances next married George Ivory Willis after 1801. (George Ivory Willis died before 1840 and was buried in Joshua Talbott Burying Ground, nr Towson, Baltimore, Maryland, United States.)
1 Baltimore: Its History and Its People (Vol. 3. New York: Lewis Historical Publishing Company, 1912.), p. 795.
Ridgely, Helen W, Historic Graves of Maryland and the District of Columbia (New York: The Grafton Press, 1908.), p. 128.