I found this Edward HARVEY born 1829 but don't know if or what the connection to the Moyle's is or if it's the son of Edward & Mary Harvey
1841 Porkellis, Wendron
HO107 Piece:139 Book/Folio:5/47 Page:7
MOYLE, Edward M 60 1781 Cornwall Tin Miner
MOYLE, Mary F 60 1781 Cornwall
MOYLE, Bennet M 25 1816 Cornwall
MOYLE, James M 20 1821 Cornwall
MOYLE, Edward M 12 1829 Cornwall
MOYLE, Martha F 15 1826 Cornwall
HARVEY, Edward M 12 1829 Cornwall
I can't see Richard either on 1851 census