The cause of the accident rests in the realm of speculation- and conjecture. Negligence will not be presumed from the mere.happening of an accident. In the absence of evidence on the question, freedom from negligence will be presumed. Ivey v. Rollins, 251 N.C. 345, 111 S.E. 2d 194, and 250 N.C. 89, 108 S.E. 2d 63.
The judgments below are
Affirmed.