Adrammelech and the Shambling Corpses

I'm facing Adrammelech in the Zertinan Caverns, and I can kill him quite easily with a couple Quickening chains, but I am a bit worried about his psychotic little zombie minions. If I kill him too quickly, I won't have killed enough of them to fill their page on the Bestiary. So, do I have to hang in the fight long enough to kill a dozen of those things, or is there some other place/time I can find them to get them in my Bestiary?

You can come back to the area whenever, the corpses still spawn repetetively.

Thanks, that's what I wanted to know.

Those were annoying as hell....

Adrammelech and the Shambling Corpses would be an awesome name for a band.