Where can I find unsaved Preview images? I have two unsaved images open in Preview. My Mac is on strike, no screen usable, but SSH is working fine. I really want to salvage my images. 

Where can I find my images ?

At worst, I would accept memory dump as an option.
Look at /Users/(your user)/Library/Containers/com.apple.Preview/Data/Library/Autosave Information/
That's where mine are right now.