Delivering for America

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Across
  1. 2. First U.S. stamp chosen by public vote. Find a clue in Gross Stamp Gallery (Level 2).
  2. 5. What did USPS use the message "don't tie up the mail" and Mr. Zip to introduce? Find a clue in Systems at Work (Level 1).
  3. 7. First colonial mail route ran between these two cities. Find a clue in Starting the System(Level 1).
Down
  1. 1. special U.S. stamp sold at a higher price to support a cause. clue in Gross Stamp Gallery (Level 2).
  2. 3. Oldest federal law enforcement agency. Find a clue in USPIS (Level 1).
  3. 4. initials of the two founding fathers on the first US stamps. Find a clue in Gross Stamp Gallery (Level 2).
  4. 6. Famous postal mascot who rode the rails. Find a clue in the Atrium (Level 1).