The search results do not explicitly mention who was elected without opposition during the 30th General Assembly of Newfoundland. For further details, you might want to explore more specific historical records or detailed accounts related to the 1951 Newfoundland general election and the proceedings of the 30th General Assembly for such information. Here is a Wikipedia page on the 30th General Assembly of Newfoundland that might contain useful context about this period, even if it does not directly answer your question.
What was the term duration of the 30th General Assembly of Newfoundland?
Who was the lieutenant governor of Newfoundland during the 30th General Assembly?
Who led the Liberal Party during the 30th General Assembly of Newfoundland?
Which historical family was primarily associated with the ownership of Garendon Hall?