Mark 6:15

But others said, It is Elijah. And others said, It is a prophet, even as one of the prophets. But Herod when he heard thereof, said, John, whom I have beheaded, he is risen.

The independence of the sacred narratives is conspicuously evident in this passage which has elements similar to Matthew 16:13,14. In that passage, the apostles responded to Jesus' question by saying that people were saying that he was John the Baptist, Elijah, Jeremiah, or one of the prophets. Here the same information is given in a completely different context. There it featured a private interview with Jesus' disciples. Here it was a topic discussed in the presence of Herod. See also under Mark 6:14.