LAND OF REST (American) and NEW PROSPECT

Hello,

Even though NEW PROSPECT has some differences in its B section, it is the originator to Buchanan's LAND OF REST tune, with the notes saying as much:

LAND OF REST is an American folk tune with roots in the ballads of northern England and Scotland. It was known throughout the Appalachians; a shape-note version of the tune was published in The Sacred Harp (1844) and titled NEW PROSPECT as the setting for “O land of rest! for thee I sigh."

Should these be merged?