It does look as if she was born in Illogan though. On checking the marriage, I found Frederick Burrows married a Caroline Osborne in Redruth in 1891. I looked up Carline on the 1891 census where she is living in the Village of Blowinghouse which is in the Parish of Illogan.
1891 Census:
Jane Osborne aged 60, Housekeeper, Widow born Breage
Elizabeth Osborne, aged 29, single, Tin Miner's Surface Labourer, born Illogan
Emily Osborne, aged 29, single, Tin Miner's Surface Labourer, born Illogan
Elizabeth Osborne, aged 28, single, Domestic Servant, born Illogan
Caroline Osborne, aged 26,single, Dressmaker, born Illogan.