Evidence for speaking-trance mediums in Early Christian, Jewish, and Greco-Roman texts

In Antiquity there was no term that directly translates as 'medium' in modem English. The term 'prophet' might be a candidate. Ancient texts representing different literary genres in Sumerian, Akkadian, Hebrew, Greek, and Latin attest to varied activities of prophets and the spirits that operated on them. This paper will review some Early Christian, Jewish, and Greco-Roman texts that identify the descriptions and activities of speaking-trance mediums, i.e. those whose oracular pronouncements are in a state of trance wherein the speech of the medium is actually that of an indwelling foreign spirit who makes use of the organs of speech.