The Alden or Lakeside Theatre was located in Pennsylvania on or near the campus of Mullencroft College. It was founded by Doctor Ann Alden (after whom it was offically named) and Professor Carl Szabo out of the Alden Arts Combine. Its more common name refered to the fact that it lay alongside a lake. An attempt to stage the Play was made here (as recorded in The Dream-Leech) which ended in the theatre being destroyed by fire.