1891
Flying saucers on the attack
1954
Strange mysteries of time and space
1959
Flying saucers uncensored
1955
Captain Kidd and his skeleton Island
1937
Hunting hidden treasures
1929
Secret cities of old South America
1950
Treasure hunting
1932
Flying saucers on the moon
1954
Great English schools
1925
Modern buried treasure hunters
1934
A modern treasure hunter
1948
Panorama of treasure hunting
1940
Pirate treasure
1937
Marvels of modern mechanics
1926
Mysteries of ancient South America
1946
