These are people whose lives kept the eyewitness testimony about Jesus Christ alive. Searching for these letters takes time so I will be updating this list when I can. The last update was on July 2, 2018.

Clement of Rome:

Ignatius of Antioch:

Polycarp of Smyrna:

Justin Martyr:

Tatian, the Disciple of Justin Martyr:

Irenaeus, Bishop of Lyons:

Clement of Alexandria:

Tertullian of Carthage:

Origen of Alexandria: