Proteus wrote:
From Reply No. 24, "ABOUT MARCION," on the "First Century GT origins" thread:

Marcion was the first to propose a New Testament canon. His canon consisted of only eleven books grouped into two sections: the Evangelikon, being a version of the Gospel of Luke, and the Apostolikon, a selection of ten letters of Paul the Apostle who Marcion considered the correct interpreter and transmitter of Jesus' teachings.

Marcion's dates being ca. 85-160 C.E., this also makes those letters first-century works.

Nope, it only means there was a version of something at the time.  It doesn't mean they were even close to the third-century versions that we have today.  So, there was something written by the time of Marcion, purporting to be letters of Paul the Apostate, copies of which did not survive.  Further, the writings of Marcion were preserved by whom?  He is considered an authority by whom?