The following photos are taken from Antique Associates at West Townsend, Inc. of a Babcock cane gun:
The trigger and handle:
And the barrel:
So you're just walking down the street, see that old chap who slept with your sweetheart, lift up your cane and BANG! The unsuspecting blighter is now dead, and you can keep on walking like you had nothing to do with it.
No wonder cane guns are classified as concealed weapons and forbidden- California state law has specifically made it a felony to own a cane gun.