Don't assume anything in an older house! No telling what is what. Also a previous owner of the house may have told you something which was not quite correct - may have used the wrong terms.
So first of all, let's be sure we are using the correct terms.
A "4-way" switch would be used between two "3-way" switches to control say one light.
Here is a wiring diagram of two 3-way switches with a 4-way switch in the center...
If you have one light and need two switches, you would use two 3-way switches.
If you have one light and need three switches, you would use two 3-way switches and a 4-way switch.
Or if you had one light and need four switches, you would use two 3-way switches and two 4-way switches.
So just to be clear on what you want...
Which light do you want these switches to operate?
How many switches do you want to operate this light?