In all such instances the two conceptions followed each other very rapidly, the offspring arriving at maturity together, and being born at the same accouchement. But more curious and wonderful examples of second and concurrent pregnancies have been published than these--as, for instance, those in which a child bearing all the attributes of a fœtus at full term is born two, three, four, and even five, months after the first, which appeared also to have been born at full term. Marie Anne Bigaud, aged thirty-seven, gave birth, April 30, 1748, to a living boy at full term, and on the ensuing September 16, to a living girl, which was recognised, by the size and well-developed condition of its body and limbs, to have been also carried until full term. This fact was observed by Professor Eisenman, and by Leriche, surgeon-major of the military hospital of Strasbourg. It will be noticed that there was an interval of four and a half months between the two accouchements. The first child lived two and a half months, and the second a year. In this instance there was not a double womb, as might perhaps be supposed, for after the mother's death an examination proved that the uterus was single. Another case of this kind is the following:--Benoite Franquet of Lyons brought into the world a girl on January 20, 1780, and five months and six days afterwards a second girl, also apparently at term, and well nourished. Two years later these two children were presented, with their certificates of baptism, to two notaries of Lyons, MM. Caillot and Desurgey, in order that the fact might be placed on record and vouched for, because of its value in legal medicine.