The odors occasionally wafted from the laboratory were likewise exceedingly strange. Sometimes they were very noxious, but more often they were aromatic, with a haunting, elusive quality which seemed to have the power of inducing fantastic images. People who smelled them had a tendency to glimpse momentary mirages of enormous vistas, with strange hills or endless avenues of sphinxes and hippogriffs stretching off into infinite distance. His older aspect increased to a startling degree his resemblance to the Curwen portrait in his library; and Dr. Willett would often pause by the latter after a call, marvelling at the virtual identity, and reflecting that only the small pit above the picture’s right eye now remained to differentiate the long-dead wizard from the living youth. Frequently he noted peculiar things about; little wax images of grotesque design on the shelves or tables, and the half-erased remnants of circles, triangles, and pentagrams in chalk or charcoal on the cleared central space of the large room. And always in the night those rhythms and incantations thundered, till it became very difficult to keep servants or suppress furtive talk of Charles’ madness.