Dear Mavis,I have a Clarissa in my family tree. She born in 1831 to Cornelius S. Vosburgh(1786-1864) and Permelia Pulver(1786-1877). Cornelius's parents were Martin Vosburgh and Hannah Young(1763-1845).Permelia's Father was Jacob Pulver.Clarissa was 1 of 13 chidren: Seymour((1813-1858 he married Mahala comstock 1817-1900), Charles A.,Sophia, Eliza, Samuel, William, Jacob, James, Permelia, Ellen, Clarissa, Cornelius(1834-), Hannah.
Seymour was my grandmother's Great grandfather. Her name was Doris Keim if anyone is looking for the Vosburgh-Keim connection.