The hill consisted of a red ferruguinous sandstone, in parts of which were imbedded univalve and bivalve shells, pieces of water-worn or burnt wood, and what seemed fragments of bone.
"Journal of an Expedition into the Interior of Tropical Australia In Search of a Route from Sydney to the Gulf of Carpentaria (1848) by Lt. Col. Sir Thomas Livingstone Mitchell Kt. D.C.L. (1792-1855) Surveyor-General of New South Wales"
Thomas Mitchell
His next thought was a small bivalve speculum, that is to say, two portions of tubes cut longitudinally and fastened together in such a way that the ends could be forced apart.
"Makers of Modern Medicine"
James J. Walsh
Notwithstanding its faults, however, the bivalve laryngeal speculum accomplished somewhat of the purpose intended.
"Makers of Modern Medicine"
James J. Walsh