prov:value
| - Every letter, writing, circular, postal card, picture, print, engraving, photograph, newspaper, pamphlet, book, or other publication, matter, or thing, of any kind, in violation of any of the provisions of this Act is hereby declared to be nonmailable matter and shall not be conveyed in the mails or delivered from any post office or by any letter carrier: Provided, That nothing in this Act shall b
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