s. On the other neck were two heads, as seen in the
accompanying illustration. Geoffroy-Saint-Hilaire mentions several
cases, and Martin de Pedro publishes a description of a case in Madrid
in 1879. There are also on record some cases of triple monster by
inclusion which will be spoken of later. Instances in the lower animals
have been seen, the three-headed sheep of Pare, already spoken of,
being one.

CLASS II.--Double Monsters.--A curious mode of junction, probably the
most interesting, as it admits of longer life in these monstrosities,
is that of a simple cartilaginous band extending between two absolutely
distinct and different individuals. The band is generally in the
sternal region. In 1752 there was described a remarkable monstrosity
which consisted of conjoined twins, a perfect and an imperfect child,
connected at their ensiform cartilages by a band 4 inches in
circumference. The Hindoo sisters, described by Dr. Andrew Berry, lived
to be seven years old; they stood face to face, with their chests 6 1/2
inches and their pubes 8 1/2 inches apart. Mitchell describes the
full-grown female twins, born at Newport, Ky., called the Newport
twins. 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. Hence, for the most
part, they were of Chinese blood, which probably accounted for their
dark color and Chinese features. Their mother was about thirty-five
years old at the time of their birth and h