Here's what IRAD has from Chicago on probate: http://www2.sos.state.il.us/cgi-bin/irad County Title Beg_Date End_Date Depository Accnum COOK PROBATE ADMINISTRATOR'S BONDS AND LETTERS 1877 1923 NEIU 7/0045/34 COOK PROBATE ADMINISTRATOR'S BONDS AND LETTERS WITH WILL ANNEXED 1877 1931 NEIU 7/0045/35 COOK PROBATE CASE FILES INDEX 1871 1935 NEIU 7/0042/01 COOK PROBATE EXECUTOR'S BONDS AND LETTERS 1879 1923 NEIU 7/0045/37 COOK PROBATE GRANTS OF ADMINISTRATION RECORD 1877 1922 NEIU 7/0045/36 COOK PROBATE GRANTS OF GUARDIANSHIP RECORD 1877 1923 NEIU 7/0045/40 COOK PROBATE GUARDIAN'S ACCOUNT RECORD 1877 1923 NEIU 7/0045/41 COOK PROBATE GUARDIAN'S AND CONSERVATOR'S RECORD INDEX 1871 1921 NEIU 7/0042/02 COOK PROBATE GUARDIAN'S BONDS AND LETTERS 1877 1923 NEIU 7/0045/39 COOK PROBATE INVENTORY RECORD, GUARDIANS 1880 1923 NEIU 7/0045/42 COOK PROBATE MISCELLANEOUS RECORD 1871 1926 NEIU 7/0045/33 COOK PROBATE PROOF OF WILL RECORD 1882 1882 NEIU 7/0045/30 COOK PROBATE RECORD 1871 1923 NEIU 7/0045/29 COOK PROBATE RECORD INDEX 1912 1922 NEIU 7/0045/28 COOK PROBATE WILL RECORD 1879 1928 NEIU 7/0045/31 COOK PROBATE WILL RECORD INDEX 1850 1919 NEIU 7/0042/03 COOK PROBATE WILL RECORD, EXTRA-JURISDICTIONAL 1904 1922 NEIU 7/0045/32 Cook County courts can't find files from the 1970s, let alone 1900. Cheryl Rothwell LoganCty@mindspring.com