Appears she is the daughter of Timothy Wellington Adams and (Mary E) Emma Lad (Lord). You might want to check for ancestry on DAR.org. Timothy W son of Henry son of Seth Adams and Judith Bryant, etc etc. noted at the end.
http://www.sfgenealogy.com/sf/vitals/sfmarrm.htm (Marriage announcement)
"ROBINSON/ADAMS--In this city, October 18, at the residence of the bride's parents, by Rev. A. L. Stone, D. D., Walter T. ROBINSON, of San Francisco, to Miss Isabel W. ADAMS, formerly of Montvale, Mass. [Boston (Mass.) papers please copy.] Source: San Francisco Morning Call, 21 Oct 1879, p.4.
Woburn records of births, deaths and marriages from 1640 to 1873 alphabetically and chronologically arranged by Edward F. Johnson.
Isabella Woodford, d. of Timothy W. and Emma, Jan. 8, 1860.
Isabella Woodford Adams
08 Jan 1860 Woburn, Middlesex, MA
father: Timo W. Adams
mother: Emma Lad Adams
U S Census, 1870 Woburn, Middlesex, MA
Timothy W Adams M 35y MA
Emma Adams F 34y Eng
Isabelle Adams F 10y MA
George Adams M 8y MA
Edwin W Adams M 1y MA
U S Census 1910 San Francisco Assembly District 35, San Francisco, CA
head Walter W Robinson M 24y CA
moth Isabelle W Robinson F 50y MA
Grandfather Timothy W Adams M 76y MA abt 1834
DAR record: Descendant Timothy W Adams and Mary E(mma) Lord