Just found your 3-10-07 query re Catharine Fiske nee Kata., d. of Luther and Azubah. I'd found that info in 1990 and I've been looking since; just today, while browsing vital records of Boston,MA 1762 to whenever, I noticed a lot of Kata.'s and it occurs to me that Kata. may be an abbreviation for the variant spellings of Catherine.
According to Sarah Josepha Hale's book Woman's Record, Fiske's father died when she was a few months old and her mother later married an improvident man named ______Morse. Also that Fiske began teaching at age 15 in Dover, VT. I haven't found any records re that or anything else until Fiske and her mother came to Keene in abt 1811, when she apparently taught in a district school. In her will Fiske calls her mother Azubah Morse.
There's a lot of info re Catharine Fiske's school, which started as The Young Ladies' Boarding School In Keene, NH (she later changed the name to The Young Ladies' Seminary In Keene, NH), at The Historical Society of Cheshire County, NH, located in Keene, but nothing more than you and I already know about her early beginnings.
I'm not a Fiske. I was an adult student at Keene State College when I did a paper on Fiske and the YLS in abt 1990. I've lost my paper but still have research materials and curiosity about this intelligent and ambitious woman, and recently decided to see if I could find any more abt her and the school. I contacted the Historical Society which told me that someone is doing a book on the subject and has compiled quite a lot of new information; they said they would let the person know of my interest.
Good luck to you. I'll pass along anything I learn, and I'd appreciate it if you'd do the same.