Hello Frank, I am also looking into the Manire's of cornwall. What sort of info do you have? I have only a little so far. I am tracing through Richard Manhire (son of John and Grace). I know that he came to australia in 1849 (I believe that the ship was the "Marion"). He married a Mary Williams in adelaide, south australia, in 1853. So far I have traced birth and death records for up to 17 children however several died at less than a year old. I have been told that Richard was born in Kea, Cornwall but I don't know the date. Do you have anything that matches that? That is all the information I have on the english side. Richard's daughter, Mary Ellen, married John Mclaren so our family connection to the Manhire line stopped then. Most of this infromation can be found on the Australian Genforum page.
Does this help you? Do you have anything useful to swap? Erika