His papers relate to his careers as journalist, propagandist and conservationist. Among his correspondents was Laurens van der Post, a boyhood friend. There are personal papers including correspondence, notebooks, diaries and records relating to organisations with which he was associated. There is interesting information on the Broederbond and a fine collection of negatives for "Libertas", the journal he edited during the war.

Constitution, correspondence, memoranda, reports, minutes and printed items such as 'Libertas', the Truth Service magazine.
Subjects are primarily the organisation of the Truth Service and Truth Legion, pro-war an anti-fascist campaigns. Other subjcts are the bilingual school issue, malnutrition, gold standard, elections, Campaign for Right and Justice, Broederbond and Ossewa Brandwag.