The woman who gave birth to them became impregnated, it is said, immediately after seeing the famous Siamese twins, and the products of this pregnancy took the conformation of those celebrated exhibitionists.
Perhaps the best known of all double monsters were the Siamese twins.
They were exhibited all over the globe and had the additional benefit and advertisement of a much mooted discussion as to the advisability of their severance, in which opinions of the leading medical men of all nations were advanced.

The literature on these famous brothers is simply stupendous.

The amount of material in the Surgeon General's library at Washington would surprise an investigator.

A curious volume in this library is a book containing clippings, advertisements, and divers portraits of the twins.

It will be impossible to speak at all fully on this subject, but a short history and running review of their lives will be given: Eng and Chang were born in Siam about May, 1811.
Their father was of Chinese extraction and had gone to Siam and there married a woman whose father was also a Chinaman.