epistle

epistle is a Noun

Definition:

[1] A writing directed or sent to a person or persons; a written communication; a letter; -- applied usually to formal, didactic, or elegant letters. A madman`s epistles are no gospels. Shak.

[2] One of the letters in the New Testament which were addressed to their Christian brethren by Apostles. Epistle side, the right side of an altar or church to a person looking from the nave toward the chancel. One sees the pulpit on the epistle side. R. Browning.