***** NOT A TEACHER *****
(1) From your many past posts, I know that you are open-minded
and eager for vigorous debate.
(2) With that in mind, I most respectfully present for your
consideration a scholar's viewpoint that I found on the Web
(sourcing to follow presently):
Constructions like ... "murder will out" ... in which an
"auxiliary" is combined with an adverbial adjunct of
direction, are regular idiom in Old, Middle and early
Modern English. ... To call this idiom elliptical, as OED
does, is misleading since it would suggest that the
construction with an infinitive of a verb of motion
... should be the regular ("correct") one.
I copied it word for word. Those quotation marks are his
-- and very telling they are. Of course, I do not dare tell you
how I interpret his words, but -- this time!!! -- I feel that I do
understand what he is saying.
Source: I googled: "Murder will out" lexical verb.
The third result is entitled: An Historical Syntax of the English
Language, Fredericus Theodorus Visser, Professor Emeritus, the
University of Nijmegen (the Netherlands).