Thank you for posting the whole prayer.
Now let's start singing the hymn again:
See o'er Lepanto's waters spread the Moslems' dark array! / A voice to Christendom went forth and gave the word to pray. / Jesus! Mary! Names of strength, invoked and not in vain: / They triumphed in our hour of need and triumph shall again.
The other verse are even better. I posted them all the other day.
That looks like a 14 14 13 14 cadence. Can you suggest a melody? None springs to mind for that count!