In Abraham Kuyper, which is the trade edition of Kasteel’s doctoral dissertation, a few letters are reprinted in full along with many fragments from Kuyper’s writings. On page 108 there is a letter, dated Rome, November 6, 1876, that was written during Kuyper’s lengthy period of recuperation abroad (see 1875.08) and sent to friends in Utrecht who had expressed their sympathy. Page 197 reproduces a letter to A.F. de Savornin Lohman, dated February 4, 1895, in which Kuyper denies that he is trying to make Lohman’s position as a professor at the Vrije Universiteit and as a politician in the Anti-Revolutionary Party impossible. On page 199 there is another letter to Lohman, dated April 20, 1895, in which Kuyper reacts to Lohman’s dismissal from his professorship. The draft of a letter written in April 1906 to Queen Wilhelmina to accompany a special memento he was taking back for Her Majesty from the court of Gethsemané is printed on page 271. Next, a passionate letter full of reconciling words written on December 28, 1919—after many years of aloofness and division—is presented on page 332. It was sent in response to a letter that De Savornin Lohman had written to Kuyper on the day after Christmas 1919 (see also 1952.02, 1962.01, 1964.01, 1987.03, and 1992.02). Finally, 1918.14 (dated October 31, 1918) is printed on page 335.

The poem from 1897.16 is also reproduced on page 116. The book had a print run of 1,500 copies, including 125 copies with separate theses.

P.A. Kasteel (1901–2003) became a doctor of law in political and social science at the University of Leuven on December 23, 1938. He also served as editor and editor in chief of several newspapers, as chief administrator of the Netherlands Antilles (1942–1948), and as ambassador to Chile (1948–1956), Ireland (1956–1964), and Israel (1964–1967). He died in Rome on December 12, 2003.