And it came to pass, that, while Apollos was at Corinth, Paul having passed through the upper country came to Ephesus: and finding certain disciples,
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George Leo Haydock
AD 1849
Disciples. These were apparently disciples of St. John the Baptist, who believed in Christ from his testimony, and had received no farther instruction, nor any baptism but John's. (Calmet)
Accordingly, in the Acts of the Apostles, we find that men who had "John's baptism "had not received the Holy Spirit, whom they knew not even by hearing.