The Chicago Cipher

A writer went into the Union Stock Yards in 1904 and came out with the packinghouse motto. This week Our History walked through a city that sold the Skyway, the meters and the ground under South Works. Same motto.

Every letter below is standing in for another one. Tap a box, then tap the letter you think belongs there, and every box with that same code letter fills in at once. Two letters are on the house.