The Siamese twins Chang and Eng were joined together by a thick ligament that looked like a third arm.
Their heartbeats were different; when one drank, the other remained sober; when one fell ill, the other often did not.
Still, at that time, the doctors couldn’t be sure how many, if any, internal organs they shared, so there was simply no guarantee that they would survive if they were separated.
When Chang had a stroke in the 1870s and lost the use of the side closest to his brother, Eng had to lie beside him during recovery.
Chang, always the weaker of the twins, came down with bronchitis in 1874 and passed away while they were sleeping.
Eng was terrified upon waking, saying, “Then I am going!” After suffering through shakes and pains, Eng, too, died.
An autopsy revealed that Eng didn’t die because of the disease that killed Chang.
Tragically, he died of fright from thinking there was no way to survive the death of his brother.