sentences:  Pius II renewed the excommunication and commissioned Bishop Lelio of Feltre to reply to Gregory's appeal.The "Replica Theodori Lælii episcopi Feltrensis pro Pio Papa II et sede Romanâ" brought forth from Gregory his "Apologia contra detractationes et blasphemias Theodori Lælii" together with his "Depotestate ecclesiæ Romanæ", in which he defended the theories of Basle.His next important writing, "Invectiva in Nicolaum de Cusa", appeared in 1461.