Observation of the Day aka Certainly News to Me:
Its temporal antessive use in http://eldamo.org/content/words/word-1029560541.html would indicate that the "mysterious s-case" of Quenya was at least at one point very convergent with the Terminative case (as employed in Hungarian).
Tamas Ferencz Jan 31, 2018 (16:40)
Ицхак Пензев Jan 31, 2018 (16:48)
Tamas Ferencz Jan 31, 2018 (18:42)
Ицхак Пензев Jan 31, 2018 (22:04)
Tamas Ferencz Jan 31, 2018 (22:39)
Ицхак Пензев Feb 01, 2018 (06:43)