"The Sacred Writings Of ..." provides you with the essential works among the Early Christian writings. The volumes cover the beginning of Christianity until before the promulgation of the Nicene Creed at the First Council of Nicaea.
The Epistle of St. Polycarp was a reply to one from the Philippians, in which they had asked St. Polycarp to address them some words of exhortation; to forward by his own messenger a letter addressed by them to the Church of Antioch; and to send them any epistles of St. Ignatius which he might have.
Polycarp's martyrdom is described in a letter from the Church of Smyrna, to the Church of Philomelium "and to all the brotherhoods of the holy and universal Church", etc. The letter begins with an account of the persecution and the heroism of the martyrs.