Herbertson, J. J. W. (1939) Note attached to draft letter for the Australian government. No Publisher, uk. (Unpublished)

Herbertson, J. J. W. (1939) Discussion of proposed New Zealand Conference on Pacific Island matters. No Publisher, uk. (Unpublished)

Herbertson, J. J. W. (1938) Conference with New Zealand on trans-Pacific air routes. No Publisher, ukwp. (Unpublished)

Herbertson, J. J. W. (1938) Report of telephone conversation. No Publisher, ukwp. (Unpublished)