An Interactive Fiction adventure by Jon Thackray and Dr. Jonathan Partington for the IBM System/370 'Phoenix' mainframe system at the University of Cambridge.
You are a tourist visiting Stratford-upon-Avon, but all is not as it seems... When you try to buy a cauldron off these three old ladies, things start to get weird. When you leave the shop, you are in the middle of Stratford again - but it is populated with characters from Shakespeare's plays. You must save yourself from the wicked witches, travel between different seasons and try not to get killed while you seek for the way back to the real world...