Died in the city of Burlington, Tuesday October 18, 1892 Mrs. Lucy Whalen, sixty years, the only surviving daughter of Catherine Salisbury of near Ft. Green. She left six children, a mother and three brothers to mourn her loss.  She died of typhoid fever and by request was brought to the Webster Cemetery and buried by the side of her fathers [sic] and brothers Thursday October 20th at 2 p.m.

Lucy Salisbury Duke Whalen, daughter of Wilkins Jenkins Salisbury and Katherine Smith, was buried in an unmarked grave according to Warren L. Van Dine, who read Webster Cemetery in 1965.

She was first married to Samuel Duke in Clark County, Missouri, on January 21, 1847.  From a Clark County marriage register:

The 1850 census listing, below, might have been for Lucy and Samuel, but it is far enough afield to be questionable.  They were counted in Hire Township, McDonough County, in 1860.  They were parted when Samuel died in July of 1865.  In 1870 Lucy and the younger children were living in Carthage Township, Hancock County.

Lucy married Patrick Whalen from Ireland sometime in the early 1870s.  On September 1, 1873, she wrote a note from Hannibal, Missouri, giving her consent for her son, Newton, to get married. Later, according to Van Dine and the above news item, Lucy was living in Burlington, Iowa, where she died.

We do not know the precise death date or final resting place for either Samuel Duke or Patrick Whalen.

Note that while Lucy's signature reads Whalon, the only other instances we have found thus far read Whalen.

We are assuming, based solely on census records, that Samuel and Lucy's children were born in McDonough County, Illinois, perhaps in the area named Hire Township in 1857:

i.	Andrew Duke, born about 1851.
ii.	Henry C. Duke, born about 1853.
iii.	Newton M. Duke, born about 1855.  He died after July 16, 1884.
iv.	Milton Duke, born about 1858, apparently did not survive childhood.
v.	Ida Duke, born about 1861.
vi.	Robert Duke, born about 1863; he died May 5, 1916, burial at Webster Cemetery.
vii.	Emma Duke, born about 1866.

Apparently born to Patrick Whalen and Lucy Salisbury Duke:

Samuel Duke, 33, male, farmer, born NC
Nancy, 18, female, born IL
John McElvain, 13, male, born OH, attended school within the year
Daniel Salsbury, 8, male, born IL, attended school within the year

Samuel Duke, 32, male, farmer, value of real estate 750, value of personal estate 240, born NC, male, citizen of the U.S. aged 21 or more
Lucy, 25, female, born OH
Andrew, 9, male, born IL, attended school within the year
Henry C, 7, male, born IL, attended school within the year
Newton, 6, male, born IL, attended school within the year
Milten, 2, male, born IL

Duke, Lucy, 36, female, white, keeping house, value of personal estate 400, born OH
Newton, 15, male, white, born IL, attended school within the year
Ida, 9, female, white, born IL, attended school within the year
Robert, 7, male, white, born IL, attended school within the year
Emma, 4, female, white, born IL

Whalen, Patrick, white, male, 39, married, farmer, could not read or write, born Ireland, both parents born Ireland
Lucy, white, female, 45, wife, married, keeping house, born OH, father born NY, mother born VT
Morris, white, male, 4, son, [single], at home, born IL, father born Ireland, mother born OH
Duke, Ida, white, female, 19, daughter, single, domestic servant, born IL, father born NC, mother born OH
Robert, white, male, 17, son, single, farm laborer, born IL, father born NC, mother born OH
Emma J, white, female, 14, daughter, single, at school, born IL, father born NC, mother born OH