In line with the persona's suggested weakness and sickness, other scholars take the word "porphyria" literally, and suggest that the seductress embodies a disease, and that the persona's killing of her is a sign of his recovery. Porphyria, which usually involved delusional madness and death, was classified several years before the poem's publication; Browning, who had an avid interest in such pathologies, may well have been aware of the new disease, and used it in this way to express his knowledge.