He governed the Danish Gold Coast from Fort Friedensburg (Frederiksborg).
[1] Originally, Karlsborg (Carolusburg) was where the Danish chief administrator was located.
Prior to that, the Danes had made Fort Friedensborg the administrative center of their Gold Coast possessions.
Prior to Crull, Bartholomaus von Gronstein had been designated Governor.
Normally, the chief administrator of the Danish Gold Coast was titled Opperhoved.