Morning Elmer, have you tried to see if the 1923 death record in Adams Co IL for Edwin Schermerhorn is the correct death record for your Edwin? You may be looking for a divorce record that does not exist. Gentleman died 2 Aug 1923.
On 1930 Herbert is listed as divorced, but Mildred is listed as widow. Yeah, I know it list her as 'Camren' but keep in mind woman were not real liberated back then and likely she did not 'reclaim' her maiden name. Chances are whoever answered the door did not clarify much more than my sister or daughter Mildred who is a widow.
Check the death record might list whether Edwin was still married and his place of burial. Just a thought.
Saw you found Edwin and Mildred's marriage record. Nice work.