↑ NSW Government. Registry of Births Deaths & Marriages (accessed 05 Jul 2023). Birth Index, Index entry for THORNE ERINA MCK; Parents: CHARLES MCK & WINONA A; District: MOSMAN; Registration Number: 19307/1923
↑ NSW Government. Registry of Births Deaths & Marriages (accessed 05 Jul 2023). Marriage Index, Index entry for CHARLES MCK THORNE and WINONA A CALDWELL; District: MOSMAN; Registration Number: 7386/1922
↑ NSW Government. Registry of Births Deaths & Marriages (accessed 05 Jul 2023). Marriage Index, Index entry for STEPHEN HARVEY JAMES and ERINA MCKELLAR THORNE; District: ST LEONARDS; Registration Number: 17725/1970