Lincoln and His Father

[Gene C]

This from Wikipedia "Abraham preferred not to attend his father's funeral and would not pay for a headstone for his father's grave."

This from With Malice Toward None by Stephen Oates,
"He visited with the Johnstons and the Hankses too, and then sometime that day went to see his father's grave, the prairie wind moaning around him.
Lincoln ordered a stone marker for Thomas's gave. At least the old man should have a marker" (p.206)

No footnotes for either statement.
A retelling of Herndon's opinion and interviews in Wikipedia?
Careful research by Oates, a noted historian?