Serpentine, or perhaps Serpentinus, was a man living in the 40th Century, a scientist. His exact field of specialization was either "atomic mechanician", or "Molecular Hybridizer", or perhaps sometimes "Physio-Chemist". ("The Time Machine: A Sequel")

Serpentine, along with Urthred, is named after a character from another novel by H.G. Wells, "Men Like Gods".
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