""The Cave of Illusion"" is a play written by Alfred Sutro and published in 1900. The play is divided into four acts and follows the story of a young man named Julian who is in love with a woman named Margot. Julian's father disapproves of their relationship and forbids them from seeing each other. In an attempt to be together, Julian and Margot plan to elope, but their plans are thwarted by a mysterious cave that seems to have a mind of its own...