1850 US Census, Raisin Twp, Lenawee Co, MI Harkness, Daniel W, age 25, Farmer, NY Harkness, Sarah A, age 22, NY Harkness, Miriam, age 3, MI
↑ Sarah's maiden name is assumed to be Dean, based on the death record of son Edwin, which appears to say Dean (hard to decipher), and will of her husband who names Artemus J. Dean executor of his will. Since he appears to be just slightly younger than Sarah (1850 census, line 12) he is probably her brother.