Harriet J Knapp I believe may have been an adoptive cousin of my wifes great grandmother Ettie (Wright) Blasier/Keating (1868-1923).
Ettie Wright was orphaned in 1873 when her mother Maria M. (Cass) Wright died. Maria's father was Phineas H. Cass a farmer listed in the 1840 Federal Census of Rock County, Wisconsin.
I am not sure who raised Ettie Wright but in her autograph book is a signature " To my daughter M. A. Knapp Clarks Mills Dec 1882", also a calling card "Ettie Knapp" and an autograph " Harriet Silsbee Dec 1884 Janesville cousin". However her Eulogy states that she was raised by a Mary Pettis (possibly a later remarriage).
A History of Rock County states that Harriet J. Knapp was the daughter of D. B. Knapp of Rockford, Manitowoc Co.
Any information on the Knapp or Cass families would be appreciated.