You've come to the right place. I don't know the answer, but we have a judge in the form of Father Steve -- our resident Anglican priest -- who (along with several others here, I'm sure, just to confuse you) will probably be able to answer your question. Meanwhile, to start off the confusion: "Pled" sounds better to me, but AHD4 gives "pleaded" as the preferred form:

http://www.bartleby.com/61/68/P0366800.html