Yes, I think so, they're clearly all by the same artist, but they were not in the set that Tolpan mailed me, so I had to retrieve them from elsewhere - found them by accident on Fanpop. I asked Tolpan specifically if he had created all those images, or just reposted them, but he hasn't replied yet/since. Perhaps you know?
You were right, TJ! I just went back to the archived Erik's Empire site, and they were all from there, plus more I will post some time. I still don't know if they're all his work though. I'll be doing some re-edits. Luckily, there aren't that many.