This is the fourth volume of proceedings of the Āgama seminars convened by the Āgama Research Group at the Dharma Drum Institute of Liberal Arts (formerly Dharma Drum Buddhist College). It comprises nineteen studies, contributed by eighteen different scholars, on various themes related to the Connected Collections of discourses (suttas, sūtras) — Saṃyutta-nikāya in Pali, Saṃyukta-āgama in Sanskrit