It seems that by 1845 the children of Isaac and Priscilla Ogle required a guardian.
According to the Illinois Revised Statutes in 1845, "Courts of probate in their respective counties, shall admit orphan minors, above the age of fourteen years, the father being dead, to make a choice of guardians, and appoint guardians for such as are under the age of fourteen years." 2
A guardian was appointed by the courts to supervise Isaac's five minor children, Benjamin, Lucy, Abraham B, William, and Isaac Ogle.3
William Porter was appointed guardian of the five children on 15 Mar 1845
A sixth child, Samuel Kinney Ogle, my 2nd great-grandfather, was over the age of 14 so he was able to "choose" his guardian. Samuel chose William Porter on 14 Mar 1846.4
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1 "Blue Book of the State of Illinois, complied and published by James A. Rose, Secretary of State, Springfield, Illinois 1905. Illinois State Journal Co., State Printers, 1906. Referencing "Territorial Records of the Northwest Territory, St. Clair Papers, Volume 2, page 165. St. Clair County was one of the earliest Illinois counties formed while still in the Northwest Territory.
2 Revised Statutes State of Illinois, held in the Years, A.D., 1844-'5, prepared by M. Brayman. William Walters, printer 1845, Chapter XLVII. Guardian and Ward, p 265.
3 "Illinois Letters of Guardianship 1836-1849, Book B #128. March 15, 1845. Film held at the Illinois Regional Archives Depository (IRAD), Southern Illinois University, Carbondale, Illinois.
4 Illinois Letters of Guardianship 1836-1849, Book B #161. March 14, 1846. Film held at the Illinois Regional Archives Depository (IRAD), Southern Illinois University, Carbondale, Illinois.