ST. MARTINS (Tansur)

There are two authorities, "st_martins_new_tansur" and "st_martins_old_tansur", but I can't see any difference to speak of between the instances given under them. The incipits cited are quite different, but the two instances with page scans (out of three total instances) for the "New" tune have the same incipit as the "Old" tune. So unless the tune at this instance (which doesn't have a page scan and which I don't have access to) is the odd tune out, it appears we have only one ST. MARTINS (Tansur) into which the two ought to be merged. I am going to move the two with page scans to the "Old" authority, but I don't see much if any support for "Old" in the Tune Name, so if it turns out they're all one tune, I think it should be just plain "ST. MARTINS (Tansur)" without an age specification.