Yalanzon, the appellant, was the defendant in a negligence suit. Twice a jury has returned a verdict in his favor, and twice the trial court has granted the plaintiff's motion for a new trial. From the grant of the second motion Yalanzon appeals. Granting or denying a new trial in the first instance is left largely to the trial court's discretion; however, when a new trial is granted after successive identical verdicts the presumption of legality weakens. Ansley v. Atlantic C. L. R. Co., 86 Ga. App. 152
, 155 (71 SE2d 434
). It is the policy of the law not to interfere with the second verdict unless the evidence "strongly and decidedly" mandates a contrary finding or unless harmful errors of law were committed during the second case. Dethrage v. City of Rome, 125 Ga. 802
, 806 (54 SE 654
). In this case the evidence, though conflicting, supported the verdict, and the only error of law was the grant of the motion for new trial.