The manner of Siger's death, which occurred at Orvieto, is not known. A Brabantine chronicle says that he was stabbed by a seemingly-insane secretary ("a clerico suo quasi dementi"). The secretary is said to have used a pen as the murder weapon and his critics claimed since he had done so much damage with his pen, he deserved what was coming. Dante, in the "Paradiso" (x.134–6), says that he found "death slow in coming," and some have concluded that this indicates death by suicide. A 13th-century sonnet by one Durante (xcii.9–14) says that he was executed at Orvieto: "a ghiado it fe' morire a gran dolore, Nella corte di Roma ad Orbivieto." The date of this may have been 1283–1284 when Pope Martin IV was in residence at Orvieto. His fellow radicals were lying low in the face of the Condemnations of 1277 and there was no investigation into his murder.