Answer:
Slaves were let free.
Step-by-step explanation:
The proclamation delcared "that all persons held as slaves are, and henceforward shall be free."
Unrelated Fun Fact:
Londoners in the 1600s were advised to keep "fart jars"—consisting of trapped fart odors—on hand to combat bubonic plague. The idea was that the potent smell would somehow purify the air.