Mansions of Madness

That the influence of the old house was unwholesome, he could not deny; but traces of his early morbid interest still held him there. He argued that the fever alone was responsible for his nightly phantasies, and that when the touch abated he would be free from the monstrous visions. Those visions, however, were of abhorrent vividness and convincingness, and whenever he awaked he retained a vague sense of having undergone much more than he remembered. –H.P. Lovecraft, The Dreams in the Witch House