{She that is in Babylon, elect together with you} (h(8820)en
Babul(936e)i suneklekt(885c)). Either actual Babylon or, as most likely,
mystical Babylon (Rome) as in the Apocalypse. If Peter is in Rome
about A.D. 65, there is every reason why he should not make that
fact plain to the world at large and least of all to Nero. It is
also uncertain whether h(8820)suneklekt(885c) (found here alone), "the
co-elect woman," means Peter's wife ( 1Co 9:5 ) or the church in
"Babylon." The natural way to take it is for Peter's wife. Cf.
eklekt(8869) kuri(8369) in  2Jo 1:1  (also verse  2Jo 1:13 ). {Mark my
son} (Markos ho huios mou). So this fact agrees with the
numerous statements by the early Christian writers that Mark,
after leaving Barnabas, became Peter's "interpreter" and under
his influence wrote his Gospel. We know that Mark was with Paul
in Rome some years before this time ( Col 4:10 ).