come upon

come upon (http://definr.com/come upon)

     v 1: find unexpectedly: "the archeologists chanced upon an old
          tomb"; "she struck a goldmine"; "The hikers finally
          struck the main path to the lake" [syn: fall upon, strike,
           light upon, chance upon, come across, chance on,
           happen upon, attain, discover]
     2: take possession of; "She entered upon the estate of her rich
        relatives" [syn: enter upon, luck into]