Dating back to 1868, Chicago's Lincoln Park Zoo is one of a handful of the oldest in the United States. Here's a trio of postcards dating from 1910 to 1923.
"I fed it -- Not."
The sender saw two plays while in Chicago. The first was "Sally", which opened at the Colonial Theater the previous month. That theater was torn down in 1924. Here's a great photograph.
Chet Baker's 1956 version:
Aretha Franklin recorded the song in 1962.
Tony Bennett sang it in 2015
The second play, a mystery, was "The Cat and the Canary". I wasn't able to find a reference to it's Chicago run. This is from it's 1922 Broadway production: