| Sources |
- [S613] Death Notice Hercules Rowley Langford, (Cape Archives MOOC 6/9/23413 6616/54).
- [S964] South Africa, Dutch Reformed Church Registers (Cape Town Archives), 1660-1970, (online database - familysearch.org), 1955 marriage Henry John Langford and Hendrina Susanna Kriel (Reliability: 3).
- [S153] Estate Papers Cyril George Archibald Langford, (Cape Archives MOOC 6-9-4989 56711), Death Notice (Reliability: 3).
- [S154] South Africa, Cape Province, Western Cape Archives Records, 1792-1992, FamilySearch (https://familysearch.org/ark:/61903/3:1:3QS7-L9SW-Q9FS-9?cc=1935348&wc=Q8GM-RVY%3A231794101%2C231807401 : 19 May 2016), Kuruman > Marriage records 1909-1923 vol 1/1/17/1/2 > image 164 of 197; Western Cape Archives, Cape Town. (Reliability: 3).
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