User talk:24.18.204.254

September 2013
Hello, I'm Mark Arsten. I noticed that you made a change to an article, History of gunpowder, but you didn't provide a source. I’ve removed it for now, but if you’d like to include a citation to a reliable source and re-add it, please do so! If you think I made a mistake, or if you have any questions, you can leave me a message on my talk page. Thanks. Mark Arsten (talk) 01:17, 27 September 2013 (UTC)