This ad for The Secret Museum of Mankind appeared in the July, 1942 issue of Keen magazine; scan courtesy Cardhouse (thank you, Robot). Hyperbolic in the extreme, it's even more lurid than the actual book. "1,000 REVEALING PHOTOS" is really 994, and "600 LARGE PAGES" is 564 normal-size pages.
World's Greatest Collection of
Now you can travel round the world with the most daring adventurers. You can see with your own eyes the weirdest people on earth. You witness the strangest customs of the red, white, brown, black and yellow races. You attend their startling rites, their mysterious practices. They are all assembled for you in these five great volumes of the SECRET MUSEUM OF MANKIND.
600 LARGE PAGES
Here is the world's Greatest Collection of Strange and Secret Photographs. Here are Exotic Photos from Europe, Primitive Photos from Africa, Torture Photos from Asia, Female Photos from Oceania and American and hundreds of others. There are almost 600 LARGE PAGES of Camera Shots, each page 57 square inches in size.
1,000 REVEALING PHOTOS
You see actual courtship practiced in every quarter of the world. You see magic and mystery in queer lands where the foot of a white man has rarely tread. You see Oriental modes of marriage and female slavery in China, Japan, India, etc. Through the intimacy of the camera you witness the exotic habits of every continent and the strangest customs of life and love in America, Europe, etc. You are bewildered by these large pages of ONE THOUSAND PHOTOGRAPHS, including 130 full-page photos, and thrilled by the hundreds of short stories that describe them.
5 PICTURE-PACKED VOLUMES
The SECRET MUSEUM OF MANKIND consists of five picture-packed volumes solidly bound together for convenient reading. Dip into any one of these volumes and as you turn its pages, you will find it difficult to tear yourself away. Here, in story and unusual photo, is the WORLD'S GREATEST COLLECTION OF STRANGE AND SECRET PHOTOGRAPHS, containing everything from Female Beauty Round the World to the most Mysterious Cults and Customs. These hundreds and hundreds of large pages will give you days and nights of thrilling instruction.
SEND NO MONEY
Simply sign and mail the coupon. Remember, each of the 5 Volumes is 9¼ inches high, and opened over a foot wide! Remember also that this 5-Volume set formerly sold for $10. And it is bound in expensive "life-time" cloth. Don't put this off. Fill out the coupon, drop it in the next mail, and receive this huge work at once.