For the Virgil Finlay drawing for the story "Midnight in the Mirror World" by Fritz Leiber, Fantastic Science Fiction, October 1964, page 113, most likely a publicity photo from Gregory Peck was used.
Midnight and the Mirror World by Virgil Finlay
Detail of drawing by Virgil Finlay
The same photo was used for "Double Jeopardy" in Thrilling Wonder Stories, April 1952, on page 17.
Double Jeopardy by Virgil Finlay
Detail of drawing by Virgil Finlay
The most likely source for the publicity photo is the movie "The Paradine Case" from 1947, possibly from a court scene.
