From the January 21, 1913 Brooklyn Daily Eagle:

“Enid, Okla.–A kick on the head by a mule was worth $2,800 to John Allen, a farmer living near here. Immediately after Allen was operated on today for a fracture of the skull, which the mule’s hoof had inflicted last Saturday, he remembered where he had buried that amount of money during the financial panic of 1907.”