My apologies for the 4 year delay in responding, but I just recently found the information you requested. John Cavendish is listed on the Bevelheimer genealogy site as being born on May 19, 1813, Isle of Man, England. He married Mary Hughes but no date given. John died on May 24, 1870; no burial location given. Mary Hughes Cavendish was born in 1822 (location not known) and died in 1904. She is buried at Franklin City, Ohio, USA.