I realize it's been several years since you posted your message about Sarah Parrett and John McArthur--but I was surely excited to see it! I, too, am descended from Sarah and John. I don't know all of the children, but my grandmother passed along notes that say that John and Sarah had a son named John McArthur. This son married Julia Straley. Both John and Julia were in Linn County, Iowa when they died. Their son, Oscar Everett McArthur, homesteaded in South Dakota where he met and married Cora Mabel Howard. Cora and Oscar had one daughter--my grandmother, Adeline. Oscar, Cora, and Adeline are buried in Onida, South Dakota. I would love learning more about other members of the John McArthur-Sarah Parrett family!