I think Stav01 is trying to prove that Mark Redmond, father of John and Patrick Redmond father of John who died 1914 are related, which is why it was the Redmond Flynn marriage that was asked for.
The problem as I see it, apart from not finding the marriage is proving the John Redmond born Jan 1894 is the same man that died in the war, they were born in the same place but is there a record of age for the John who died in the war, plus we can't find his brother William to confirm parents names.