Published in Transactions of the South African Philosophical Society, in 1895, in volume 9, issue 1, pages 1-7

Published in Transactions of the South African Philosophical Society, in 1895, in volume 9, issue 1, pages 20-22

Published in Transactions of the South African Philosophical Society, in 1895, in volume 9, issue 1, pages 31-41

Published in Transactions of the South African Philosophical Society, in 1895, in volume 9, issue 1, pages 42-45

Published in Transactions of the South African Philosophical Society, in 1895, in volume 9, issue 1, pages 46-47

Published in Transactions of the South African Philosophical Society, in 1895, in volume 9, issue 1, pages 48-50

Published in Transactions of the South African Philosophical Society, in 1895, in volume 9, issue 2, pages 51-53