Possible he enlisted in Civil War?
Did you check to see if she filed for his pension..?
No death records found on ww drummond, when all internet sources dry up its time to write to geneal. society or genealogy library for that area in illinois and ask for help. Good luck in your search

Name: Wiliam W Drummond
Age: 30
Estimated Birth Year: abt 1820
Birth Place: Virginia

Spouse Name: Jemina Drummond
Age: 32
Estimated Birth Year: abt 1818
Birth Place: Kentucky

Name: Hugh J Drummond (relationship?)
Age: 19
Estimated Birth Year: abt 1831
Birth Place: Virginia

Name: America V Drummond
Age: 9Gender: Female
Estimated Birth Year: abt 1841
Birth Place: Illinois

Name: Austria V Drummond
Age: 7Gender: Female
Estimated Birth Year: abt 1843
Birth Place: Illinois

Name: Alvilda V Drummond
Age: 6
Estimated Birth Year: abt 1844
Birth Place: Illinois
Gender: Female

Name: Americus V Drummond
Age: 3Gender: Male
Estimated Birth Year: abt 1847
Birth Place: Illinois

Name: Angelica V Drummond
Age: 1
Estimated Birth Year: abt 1849
Birth Place: Illinois
Gender: Female
Source Citation: Year: 1850; Census Place: Stark, Illinois; Roll: M432_129; Page: 196; Image: 4
------------------------------

Name: Jemmina Drummond
Age in 1860: 44
Birth Year: abt 1816
Birthplace: Kentucky
children
America V 19
Austria V 17
Alwilda V 16
Americus V 15
Angelica V 11
Arabella V 5 abt 1855
1860; Census Place: Oquawka, Henderson, Illinois; Roll: M653_181; Page: 299; Image: 300. Source Information:
Description:
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Other info found , not sure if this is your WW Drummond
1840 census no township
William W. Drummond IL Stark County No Township Listed 1840

Illinois State Census 1825 - 1865 1855 censsu St Clair Co, Illinois Township 2
Wm Drummond 1 1 01 0000001 Total 4 Militia(?) 1
---------------------------------
Name: Jemima Drummond
Estimated Birth Year: abt 1816
Age in 1870: 54
Birthplace: Kentucky
Post Office: Oquawka

Name: Amerian v Drummond
Estimated Birth Year: abt 1848
Age in 1870: 22
Birthplace: Illinois
Gender: Male

Name: Arabella V Drummond
Estimated Birth Year: abt 1855
Age in 1870: 15
Birthplace: Illinois

Alwilda V Ford female age 26
Maud Ford age 6
Truman Allen 27

Source Citation: Year: 1870; Census Place: Oquawka, Henderson, Illinois; Roll: M593_228; Page: 208; Image: 416


Remember The Raisin
BIBLIOGRAPHY AND INDEX
PAGE 255
W. W. DRUMMOND, PAGE 124
Jemima McClenahan Drummond
page 124
Henry McClenahan , spouse Sarah Shawhan pages 121 - 124
moved to Goshen, twonship, Stark Co, Illinois
died 1857
daughter Jemima McClenahan married W. W. Drummond, 1830
transcribed by Granddaughte rof Major McClenahan
---------------
Documents and Bio pertaining to the settlement and progres of Stark Co. IL
Author: Leeson, M. A. Date of Publication: 1887
Subjects: Stark County (Ill.) -- History., Stark County (Ill.) -- Biography., Stark County (Ill.

History of Stark Co page 61
W W Drummond setted in county in 1837

page 220-221 (OCT. 1839)
THE CIRCUIT COURT
JURORS SELECTED
Henry McClenahan
William W Drummond

RESIDENT COUNTY LAWYER
CIRCUIT COURT Stark Co,
W W Drummond

MASONIC LODGE
DATED 1850
TOULON LODGE NO 93 ANCIENT FREE & ACCEPTD MASONS
CHARTER MEMBERS W. W. DRUMMOND wosrshipful master