Obed Marsh was a sea captain from Innsmouth. He learned from the inhabitants of a Polynesian island a ritual to summon the Deep Ones. This was done on Devil Reef, this then lead to him entering into a pact with them, offering them human sacrifices in exchange for a constant supply of fish and occasionally golden artifacts. When he was arrested in 1846 the Deep Ones came to aid him, after wich Obed took control over the town. He forced the townsfolk to take the Oaths of Dagon. Marsh at some point founded the Esoteric Order of Dagon. He died 1878 and his family continued their control over Innsmouth. Obed is the great-grandfather of Robert Marsh.