E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Siamese Twins:
Yoke-fellows, inseparables; so called from two youths (Eng and Chang), born of Chinese parents at Bang Mecklong. Their bodies were united by a band of flesh, stretching from breast-bone to breast-bone. They married two sisters, and had offspring. (18251872.)
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Siamese Twins. The Biddenden Maids, born 1100, had distinct bodies, but were joined by the hips and shoulders. They lived to be thirty-four years of age.