1939 Article (Frisian)
1939 An article in eight parts
1939 An article in four parts
1939 Preface
undated notes for a speech
1928 Preface
1929 Radio speech
1922 Article
1932 Article
1923 An article in two parts
1924 Article
1938 Encyclopedic entry
1938 Article
1921 Article
1918 Article
1924-1926 An article in eight parts
1933 Lecture [German]
1935 Sermon
1934 Radio speech
Undated Notes for a speech
1937 Draft for a newspaper article
1927 Speech
1927 Notes for a speech
1930 Introduction
1930 Introductions & words of thanks
1931 Article
1934 Radio speech
1934 Foreword
1935 Preface
1936 Newspaper article
1937 Notes for a speech
1937 Introduction
1939 Article
1940 Notes
1940 Lecture
1941 Article
1941 Solemn speech
1923 Sermon (New Year’s Eve)
1925 Speech
1929 Sermon
1930 Sermon
1928 Sermon (Christmas)
undated sermon (Christmas)
1926 An article in two parts
1938 An article in five parts
1938 An article in four parts
1938 Article
1935 article
1921 Article
1939 Article
Cleves, 3 June 1942 Letter to Henricus Brandsma
6 April 1942 Speech
Dachau, 12 July 1942 Letter to his brother in law and sister
Den Haag, 6 May 1942 Letter to his brother in law and sister etc.
Cleves, 28 May 1942 Letter to Father Prior etc.
Amersfoort, 1 April 1942 Letter to Father Prior etc.
Amersfoort, 16 March 1942 Letter to Most Reverend Father Prior etc.
Scheveningen, 5 March 1942 Letter to Most Rev. Fr. Prov etc.
Scheveningen, 12 February 1942 Letter to Fr. Prov, Fr. Prior, etc.
Cleves, 12 June 1942 Letter to the German Sicherheitsdienst
1920 Article
1918 Article
1939 An article in five parts
1939 Article
1919 Article
1918 Article
1920 article
1920 Article
1921 An article in two parts
1918 Article
1938 An article in two parts
undated unfinished article
1926 Foreword
1914 Poem
1939 Article
1921 Article
1914 An article in two parts
1941 An article in five parts
1938 Foreword (Frisian)
1927 Speech
1921 Article
1933 Speech
undated sermon
1926 Summary of a speech
1914 Article
1940 Article
1941 An article in three parts
1939 An article in four parts
1940 An article in two parts
undated notes for a sermon
1907 Article
1927 Article
1914 poem
1940 Foreword (Frisian)
1941 An article in two parts
1940 Radio speech
1940 Article
1941 Article
1941 An article in two parts
1941 Article
1941 An article in three parts
undated notes for a sermon
1939 Preface
1936 Conferences
1904 Letter
1905 Letter
1938 Article
1931 Article
1940 Article
1923 Article
1920 Article
1937 Encyclopaedic article (French)
1935 design for lectures (English)
1936 Lecture (English)
1936 Lecture (English)
1936 Lecture (English)
1936 Lecture (English)
1936 Lecture (English)
1936 Lecture (English)
1936 Lecture (English)
1936 Lecture (English)
1936 Lecture (English)
1939 Sermon
1933 Solemn speech
3 April 1942 Speech
1915 Article
1915 Article
1940 An article in two parts
1940 An article in three parts
1940 An article in two parts
1940 An article in seven parts
1940 An article in three parts
1923 Solemn speech
1918 Article
1917 An article in two parts
1916 Article
1937 Report by an ad hoc committee
1913 Article
1937 Encyclopedic entry
1913 Article in two parts
1926 Book introduction
1918 Book introduction
Undated Sermon (Christmas)
1916 Article
1941 An article in four parts