[Image source: the wonderful Frank Wu (sci-fi fanasy artist) website, here.]
This is the delightful and reaching cover art by the great Frank R. Paul for the October 1929 Science Wonder Stories, illustrating "Into the Subconscious" by Ray Avery Myers, a story of a physician/shrinkologist/physicist who concocts a way of reading into the memories of his subjects--long, deep, ancestral memories. The doc (Macey) is seated at right on the cover, somehow retrieving images from the patient--an idea that has had long legs, and seen famously in the end-all road movies, Wim Wender's 1991 PunkNoir film, Until the End of the World. Or perhaps its more future-driven than that, where each viewer is viewing the other's memories or dreams or visions, rather than their own, the images flickering to life onto the monitors, initiated by the simple proximity of another person...all memories available, nothing secret.
At least in the Wenders portrayal of the dream-end of this idea, there was precious little time for anything but dreams.