User talk:Killkill21232123212321

October 2014
Hello, I'm Materialscientist. I wanted to let you know that I undid one of your recent contributions —the one you made with this edit to Roman aqueduct— because it didn’t appear constructive to me. If you think I made a mistake, or if you have any questions, you can leave me a message on my talk page. Thanks. Materialscientist (talk) 03:02, 28 October 2014 (UTC)