Johfra (1919 – 1998) kept diaries in the period from 1938 to 1998, covering a total of about 6,000 pages.

Gerrit Luidinga (1942 – 2019) received the diaries as his artistic heir in 1998. Until 2011 he digitized and edited the content and provided many references to images, reviews, oeuvre index, correspondence, etc.

Please note: all diary texts are in Dutch.