Jack, I don't think Ian was using the term 'collect' to refer to 'original' field collection necessarily, but rather some association the hymnal editor made with the tune. There is definitely a pattern of that. William Walker certainly named a lot of the folk tunes he used in Southern Harmony that way. It may not have been a place either the tune or the editor ever went to (e.g. Kedron in the 1940 Episcopal hymnal), but some association in the editor's mind at the time.
And the tune names are of course not definitive; a tune can appear as one name in one hymnal and (sometimes slightly altered) as another name in the next.
-Glenn