In the best folk tradition, the Stewart / Phillips “Chilly Winds” composition could fairly be described as "assembled" from earlier folk songs as much as it was "written." The very title and the signature line - "I'm goin' where those chilly winds don't blow" - originated in a 19th century Appalachian clawhammer banjo number that later morphed into both a blues number and then a jazz standard. One whole verse - the favorite of many fans, about the "headlight on a westbound train" - was lifted in toto from a 1930s Jimmy Noone recording of "Blues Jumped The Rabbit" - and from several old published versions of "I Know You Rider." And the "Leavin' in the springtime / Won't be back til fall" trope also appears in a number of older folk songs.
No matter, though - that's how folk music works, and "Chilly Winds" stands on its own as one of the best of the art-folk original songs of the revival period. Its roots in older songs are actually one of its strengths, and few if any other songs of the era articulate the melancholy of a dying romance so well.