De Heeren Thienen, executives of the college of directors of the West-Indische Compagnie (W.I.C.) in Amsterdam, demanded that their directors-general in Elmina keep accurate journals or day books, copies of which had to be sent to Holland regularly and at short intervals (one to three months), to each of the five “Kamers” or Chambers: Amsterdam, Zeeland, Maas, Stad, and Lande en Noorderquartier. These journals were produced during most of the period of two and a half centuries that the Dutch resided at the Gold Coast. All of the still-existing journals are now stored at the Algemeen Rijksarchief (ARA) in The Hague in Holland.

Unfortunately, many of the manuscripts dating from before 1700 have gone, lost either by deliberate destruction, by thoughtless bureaucrats, or by accidental fires. Of the manuscripts now in the ARA many are in poor condition and are not available for consultation; others are being microfilmed, which makes studying these valuable documents somewhat tiresome. Fortunately, when I transcribed the day book of 1721 on my laptop computer, I was lucky enough to be able to use the original manuscript; a few weeks after I had finished this job the manuscript was microfilmed and is now available only in that format. The only other existing transcription of a journal of Elmina was published in 1953 by Karel Ratelband, whose Vijf dagregisters van het kasteel Sao Jorge Da Mina, covers the years 1645 to 1647.

The journals of Elmina written or dictated by the directors-general were used by the Heeren Thienen in Amsterdam primarily as a tool to control their staff on the Gold Coast.