I noticed that the Chris Tomlin-refrained version of "When I survey the wondrous cross" has a separate text athority from the refrainless Watts one. I thought added-later refrains were to be ignored in making text authorities. For a similar example, "Alas, and did my Savior bleed?" has a single text authority that includes in its instances those with the Hudson refrain and also other refrains, like "Oh, how I love Jesus", "Thanks to the Lamb" and "He loves me"... Why this special treatment for Mr. Tomlin and his coauthors? It seems to me none of them ought to be listed as "authors" of the hymn, but only of the refrain.