Only one aspect of the charge is pertinent in light of the present posture of the case. The Court instructed the jury, without objection, as follows:
"The plaintiff is entitled to recover the actual damages he has suffered as a result of an infringement. He must prove such damages by a preponderance of the evidence. Actual damages are the amount of money adequate to compensate Mannion for the amount of any revenue he lost as a result of an infringement. In determining revenue lost as a result of an infringement, you may consider, among other things, any evidence of the amount a willing buyer would have paid to a willing seller at the time of the infringement for the right to use on the . . . billboards an image substantially similar to the Garnett photograph." 11