I have a recording of The Kingston Trio playing Some Day Soon frpm 1965.
Ian and Sylvia recorded it in 1964 along with Four Strong Winds. Ian Tyson being the author. Both Sides Now was written in the mid to late 60's as well.

I don't know when Norland Wind was set to music, the lyric being from 1915 or so, but I don't believe it is older than 1965.

Don