1850 MI Census, Otisco, Ionia Co. MI posted at www.rootsweb.com/~usgenweb/mi/ionia/census/1850/0208a.gif lists Sophia O. Alger, daughter of William and Tamisen Alger, age 1 mo.William Alger d. 6 Sep 1870 at OtiscoMI; white male age 64 years, of Typhoid Fever.Born Rhode Island, son of Richard and Mary Alger.(MI GENDIS, available via USGENWEB) LDS Ancestral File lists Tamesin Collins b. 4 Feb 1809, dau of Joseph L. Collins and Tamesin Rice; m. William Alger 4 Aug 1839 at Otisco, Ionia, MI. I'm looking for a William O. (or Ogden William) Alger, possibly b. c. 1850.Your Sophia had a string of older sisters; might she have had a younger brother William?