I currently have the quest to escort esbern to riverwood and he has disappeared, i was following him through the tunnels under riftwood and i decided to wait an hour to recover, we had been ambushed by thalmar and now he is gone iv'e searched everywhere and can't find him! i don't have a save before this happened, anyone know where he could have run off too, his not in riverwood and i've waited days

Thanks in advance

Maybe he died or ran to that city.

I waited another week and he turned up all good