Bauer apud Martyn on Ascertaining Intention

There has been much discussion over the role of authorial intention in exegesis. I will not rehearse it here, but I've found a quotation from Walter Bauer and conveyed by Lou Martyn in his Galatians commentary (AB 33A, p. 42) that gets it right (IMHO):

On the way toward ascertaining the intention of an early Christian author, the interpreter is to ask how the author's document was understood by those who first read or heard it.