Please help news content missing

Hi.  I wrote two news articles recently, posted on our website around August 20.    I sent them out in an E-mail on that date and the links to the articles from that are below.  I looked today for them and they are completely gone.  I did not delete them and no one else would have done that.  Is there any way to find them / get them back?  Are there backups that you can pull this info from? Thanks!