The Collaborative International Dictionary of English v.0.48:

Rummager \Rum"ma*ger\, n.
   1. One who rummages.
      [1913 Webster]

   2. (Naut.) A person on shipboard whose business was to take
      charge of stowing the cargo; -- formerly written
      roomager, and romager. [Obs.]
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            The master must provide a perfect mariner, called a
            romager, to range and bestow all merchandise.
                                                  --Hakluyt.
      [1913 Webster]