As a beginner and inducted into the "Guild Of Thieves", you must steal your way to the top - the Guildmaster is there to not only help you, but to make your life a living hell.
Notes
An official remastered version of the game was released in 2017 by StrandGames for PC/macOS/Linux and Android/iOS.
In 2020 an officially authorised version of the remastered edition of the game was released for the Spectrum Next; see here.
The complex sort of "Treasure Hunt". Good parser, fine graphics (slow on the C64), fine descriptions.