This line in "The Great Gatsby" (as Nick Carraway's riding the train from Long Island into New York City) is a transitional fossil record:
"My commutation ticket came back to me with a dark stain from his hand."
Because the modern verb "commuting" and nouns "commuter" and "commute"....
stem from names for multi-ride railroad/streetcar passes that truncated or "commuted" fare payments ("commute" here being the same verb we use in "commuted their original prison sentence").
