was in the past also used to refer to a traveling case or bag for clothes. By metaphorical extension, originating with the author Lewis Carroll, the portmanteau now lends its name to a type of word composing two merged parts.

Portmanteau mail bag

In the 1700s, the term also described a mail bag. This continued into the 1800s for bags used by the United States Postal Service. An 1823 resolution in Congress

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