It is believed Sir Mortimer asked for Tolkien's expertise in 1929. Tolkien was Professor of Anglo-Saxon at Oxford University.
The ring has been linked to a curse tablet found at the site of a Roman temple dedicated to the god Nodens in Gloucestershire...
...His fantasy novel The Hobbit was published in 1937. The "One Ring", which plays a central role in Lord of the Rings, is also gold and contains an inscription in a fictional language called the "Black Speech of Mordor".