Yes, thanks for that, I believe she was the llegitamate daughter of Catherine daughter of Richard & Mary. One reason is that in 1851 Richard Hawke is living in the Dower household, if I am right he would be her 1st cousin.
Phillippa is christned Tywardreath, it would be worth contacting David, the OPC http://www.cornwall-opc.org/Par_new/t_z/tywardreath.php if you haven't already and he could check the registers if he has them to verify the info for her baptism. Bye Althea