Coming indeed from the Free Church condition I've been curious about this so searched around a bit and came across
this paper. Wanted to quote a couple of paragraphs:
"It is only a little surprising, therefore, that Cunningham had
misgivings about “lower” criticism as well as “higher” criticism.
The mere settlement of the text, “the decision of all questions
about the reading for the purpose of exhibiting the sacred text as
nearly as possible as it came from the hands of its original
authors”, as he described the “lower”, was for him important, but
only insofar as it paved the way for interpretation. What mattered
was “the investigation of the sense and meaning” of Scripture’s
statements, that is, hermeneutics or exegesis . 49 His belief that
every word of Scripture had been given by God should not be
taken, then, as an ultimate concern even for the purity of the text.
A lot of the work done in trying to ascertain it, he felt, was
insignificant . 50 Although he believed it was “necessary and
imperative that ministers should acquire some knowledge of the
leading points involved in it”, he also believed that the subject was
“not one of very great practical importance, so far as concerns the
actual discovery of the mind and will of God from his word ”. 5 1
"Cunningham fits least tidily into the thesis that the views of the
Free Church Fathers embody a kind of embryonic criticism. What
he shared with the critics was a conviction that every passage in the
Bible ought to be analysed with the utmost care; but he covered this
with an equally firm conviction that the results of such analysis
could not be inconsistent with “the general scheme of truth taught
in the Bible ”. 52 He was unequivocally opposed to criticism as he
understood it. He described it as carried on by German writers,
“some of whom have brought to this work a large amount of
learning, accompanied generally with a miserable lack of common
sense and sound logic. ” And in what he labelled “the thorough and daring infidelity of German rationalists”, he nearly
paraphrased the views for which George Adam Smith was impeached less than sixty years later."
Perhaps he fits least tidily into the thesis but perhaps he still fits (first sentence second paragraph).
One can certainly argue against a link between Mr. Cunningham's acquiescence to the textual criticism being carried on in his day and a George Adam Smith arising in the FCoS a few decades later. Smith was at least censured I think, and he left the Free Church for another denomination. But I'm just saying his views wouldn't have dared been spoken aloud in earlier times.
I see from my reading that Mr. Cunningham was a staunch defender of the Scripture and is much to be appreciated.