Art from Science Comics #6 (July, 1940) I previously attributed to Rolland Livingstone based on his style from Classic Comics:
Other art from Fox I think is by him:
Fantastic Comics #6 (May, 1940):
Fantastic Comics #7 (June, 1940):
Mystery Men Comics #11 (June, 1940):
Science Comics #5 (June, 1940):
Mystery Men Comics #12 (July, 1940):
Fantastic Comics #9 (August, 1940):
Science Comics #7 (August, 1940):
Wonderworld Comics #16 (August, 1940):
Mystery Men Comics #14 (September, 1940):
Fantastic Comics #11 (October, 1940):
Fantastic Comics #12 (November, 1940):
Mystery Men Comics #16 (November, 1940):