After their return they had a further six children, and Frank was the seventh of the nine. George Murnaghan took an active part in political life, serving on Tyrone County Council and becoming a Nationalist Member of Parliament, and left the running of the farm to his large family.
Pagkatapos ng kanilang bumalik sila nagkaroon ng karagdagang anim na bata, at Frank ay ang ikapito ng siyam. George Murnaghan kinuha ng isang aktibong bahagi sa pampulitikang buhay, serving sa Tyrone County Council at nagiging isang taong makabansa Member of Parliament, at sa kaliwa ang pagtakbo ng mga sakahan sa kanyang malaking pamilya.