E.R. Worthington is Elisha R Worthington born Ohio 27 Feb 1844. Died Apr 1902, Cochise County AZ. He served in the 143 Indiana Inf in 1865. Apparently he was enlisted for a short time in Co K, 49th Indiana Inf in 1861. He served as commander of the GAR post 312, Edmund KS per roster of 1887. He was appointed postmaster in 1878 at West Union, Norton KS. Married an Lucinda Hemphill in Indiana in 1865.

1870 census
Name: Elisha Worthington
Age in 1870: 27
Birth Year: abt 1843
Birthplace: Ohio
Dwelling Number: 139
Home in 1870: Union, Perry, Indiana
Race: White
Gender: Male
Post Office: Derby
Occupation: Farmer
Male Citizen over 21: Y
Personal Estate Value: 300
Real Estate Value: 800
Inferred Spouse: Lucinda Worthington
Inferred Children: Caroline Worthington
Household Members:
Name Age
Elisha Worthington 27
Lucinda Worthington 23
Caroline Worthington
Newell Kimball 80

1880 finds him in Norton County KS:
Name: E. R. Worthington
Age: 37
Birth Date: Abt 1843
Birthplace: Ohio
Home in 1880: Grant and West Union, Norton, Kansas, USA
Street: Grant St
Dwelling Number: 17
Race: White
Gender: Male
Relation to Head of House: Self (Head)
Marital status: Married
Spouse's name: Lucinda Worthington
Father's Birthplace: Ohio
Occupation: Farmer, P.M.
Neighbors: View others on page
Household Members:
Name Age
E. R. Worthington 37
Lucinda Worthington 33
Mary C. Worthington 11
K. P. Worthington 9
John A. Worthington 7
F. A. Worthington 5

He has land transactions/purchases as late as 1887 in Norton Co, KS.

Per Civil War pension app he was in Indian Territory (Oklahoma) in May 1990.

FWIW JohnR