Lovecraft's Dreaming Part V: Lucid Dreaming?

In George Noory's Worker in the Light, the concept of lucid dreaming is discussed. Lovecraft would be appalled by any paranormal or psedoscientific babble, but did he experience "thin-boundary" events?

Thin-boundary behavior is when a subject experiences an induced altered-state. Sleep deprivation, trauma, chemical stimulus, sleep paralysis, stress, and many other events can cause a person to experience a dream state or halucination that seems as real as if the event actually occurred. Lovecraft states in his letters to correspondents that this ocurred many times. His dreams were so real that he had headaches upon awakening, and they jarred him. Of course, many he turned into stories or story fragments.

... to be continued ...