We know Tolkien as the author of the Lord of the Rings. He was a professor and a linguist. He actually created Elven languages to support Middle Earth. He wanted them to have a certain sound.
The poem above is spoken, by Tolkien himself, in the Elbish tongue Quenya. It’s easy to hear the pattern and sounds Tolkien wanted to get across.
This recording was made in 1952, according to Tolkien Gateway which is before The Fellowship of the Ring was published.