I was recently trying to find information on the Welsh tune, Mentra Gwen, for a friend - a bit complicated as Mentra Gwen is today known as one specific folk song but the tune was widely used in previous centuries for a variety of texts. Anyway, it's the same metre as Admiral Benbow (the "Come All Ye" above) and the 'digging' took me through "Ye Jacobites by Name", "The Loyall Subject's Joy", "Sam Hall", "Jack Hall", as well as "Admiral B.". "The Loyall Subject's Joy" I found here (will this "Make a link" thing work?) and it led me to "Sound a Charge" which I found at JC's ABC Tune Finder (B438, B439)

As it happens, the search also came up with "What Wondrous Love is This" (found in Southern Harmony), but although the metre is right, the tune probably isn't related, according to my friend.

Wandering a bit from Benbow perhaps, but it might be useful to someone...

sian