Published in Trans S Afr Phil Soc Capetown, in 1905, in volume 15, pages 195-257

Published in Transactions of the South African Philosophical Society, in 1905, in volume 16, issue 1, pages 1-8

Published in Transactions of the South African Philosophical Society, in 1905, in volume 16, issue 1, pages 73-77

Published in Transactions of the South African Philosophical Society, in 1905, in volume 16, issue 1, pages 79-96

Published in Transactions of the South African Philosophical Society, in 1905, in volume 16, issue 1, pages 97-105

Published in Transactions of the South African Philosophical Society, in 1905, in volume 16, issue 1, pages 135-152

Published in Transactions of the South African Philosophical Society, in 1905, in volume 16, issue 1, pages 153-163

Published in Transactions of the South African Philosophical Society, in 1905, in volume 16, issue 1, pages 169-188

Published in Transactions of the South African Philosophical Society, in 1905, in volume 16, issue 1, pages 201-206

Published in Transactions of the South African Philosophical Society, in 1905, in volume 16, issue 1, pages 217-236

Published in Transactions of the South African Philosophical Society, in 1905, in volume 16, issue 1, pages 237-250

Published in Transactions of the South African Philosophical Society, in 1905, in volume 16, issue 1, pages 251-262

Published in Transactions of the South African Philosophical Society, in 1905, in volume 16, issue 1, pages 263-265

Published in Transactions of the South African Philosophical Society, in 1905, in volume 16, issue 1, pages 267-300

Published in Transactions of the South African Philosophical Society, in 1905, in volume 16, issue 1, pages 301-311

Published in Transactions of the South African Philosophical Society, in 1905, in volume 16, issue 1, pages 317-321

Published in Transactions of the South African Philosophical Society, in 1905, in volume 16, issue 1, pages 337-339

Published in Transactions of the South African Philosophical Society, in 1905, in volume 16, issue 1, pages 341-354

Published in Transactions of the South African Philosophical Society, in 1905, in volume 16, issue 1, pages 369-372

Published in Transactions of the South African Philosophical Society, in 1905, in volume 16, issue 1, pages 381-400

Published in Transactions of the South African Philosophical Society, in 1905, in volume 16, issue 1, pages 437-442

Published in Transactions of the South African Philosophical Society, in 1905, in volume 16, issue 1, pages 443-444

Published in Transactions of the South African Philosophical Society, in 1905, in volume 16, issue 1, pages 459-464

Published in Transactions of the South African Philosophical Society, in 1905, in volume 16, issue 1, pages 465-468