Mountain Valley Software — Australian made text adventure 1980–1987 — tribute site

Mountain Valley Software

Hand-drawn map of The Secret of Flagstone Manor. Rooms are linked by doors,
        openings and stairs: Entrance, Main Hall, Library, Dining Room, the South and North
        Ends of the Hall, Study, Lounge, Kitchen, Hallway, Main Bedroom, Warm Bed, Attic and
        a Hidden Cellar reached by a skeleton passage below the Library. Items are noted
        beside the rooms, including a grandfather clock, a wine rack and bunch of keys, a
        matchbox, an old chest and diary, and clues reading "the first is 3" and
        "the third is 7".