Laryngeals in IE

Generally Kuryl\owicz is credited with the discovery of laryngeals
in the written representation of Hittite in 1927.

I just found this footnote to the entry *ar-(3) "Arier", "Mann der
drei obersten Kasten" etc in Hermann Möller's "Vergleichendes
indogermanisch-semitisches Wörterbuch" (1911), p. 16:

"In den keilschriftlichen Urkunden von Boghaz-köi wird im Namen von
<Xarri> = Arier der anlautende Laryngal /H./ (ebenso wie
westsemitisches /H./ ...) durch assyrisch /X/ wiedergeben (s. H.
Winckler Or. Litz. 13 (1910) 291ff.). Der im Assyrischen bereits
aufgegebene Laryngal /H./ war also damals im arischen dialect noch
vorhanden...".

"In the cuneiform texts from Boghaz-Köy, the initial /H./ in the
name of <Xarri> = Arian (as well as Western Semitic /H./) is
represented by Assyrian /X/ (cf H. Winckler ...). The laryngeal /H./
which had by then been abandoned [given up] in Assyrian was thus
still present in the Arian dialect...".

(the sign I represent here by /X/ is hanging below the line, thus
presumably a laryngeal, not /s^/ or the like)

Which means Möller found laryngeals in Hittite text in 1911.
Presumably the reason this didn't have much impact was that that
observation was meant to be seen in the context of his conviction
that IE and Semitic are (closely) related.

Torsten