It is about the 1893 World’s Fair, called the Columbian Exposition, in Chicago. It was a celebration of Christopher Columbus and his discovery of the New World. The fair showcased many inventions and creations. It was a remarkable event.
My great-great-grandfather lived there at the time. My great-grandmother was a baby and became a toddler while living in Little Italy.
Often I first search Google Books and then, if unsuccessful, I use the HathiTrust.
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AARON HILL’S NOTEBOOK 