Interesting

[RJNorton]

According to the Fehrenbachers, the quote is attributed to Hugh McCulloch. They give the quote a "C."

A "C" is given to a quote that is "recorded non-contemporaneously."

McCulloch reported Lincoln as saying, "I have known Andy Johnson for many years; he made a bad slip the other day, but you need not be scared; Andy ain't a drunkard."