Here are some tools that I have created to further explore Quill adventures
A tool to reverse Engineer a Quill adventure from a ZX Spectrum, C64 or Atari snapshot
A tool to play Quill adventures online
A tool to automatically port Atari or C64 Quill adventures to the ZX Spectrum
A tool to display ZX Spectrum screen memory on a web page
A script to convert .tap files to .sna structure (note that these won't run in emulators)
A script to convert .tzx files to .sna structure (note that these won't run in emulators)