Trivial Trivia - taking trivia to new levels

[Joe Di Cola]

I think this will be a challenge. Tradition has it that it was at Chatterton's Jewelry Store where Mary's wedding ring was purchased in 1842. The words "Love Is Eternal were engraved in the ring. (It has also been reported that the entire inscription read "A.L. to Mary, Nov. 4, 1842. Love is Eternal.")

However, Chatterton himself did not do the engraving. One of his employees actually did this work.

Who engraved the words "Love is Eternal" in Mary's wedding ring?

Was it Isaac Curran? It seems to me I saw this once in an issue of the Journal of the Illinois State Historical Society, but now I can't locate the copy.