Birthdates of Lucy and Roland are too close. Source, Wolfe Tracks, has them as this close as well.
Sources
CENSUS
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MD7D-J2Y : 15 July 2017), R C Wolf in household of L J Wolf, District 3, Hardin, Tennessee, United States; citing enumeration district ED 43, sheet 16A, NARA microfilm publication T9 (Washington, D.C.: National Archives and Records Administration, n.d.), FHL microfilm 1,255,260.
BOOKS
Wolfe Tracks by Patsy Whitaker Jones
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DNA Connections
It may be possible to confirm family relationships with Roland by comparing test results with other carriers of his ancestors' Y-chromosome or mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Roland: