Het Akelige Slot van Madacrestan, Vryheer van Gierenburg

Het Akelige Slot van Madacrestan, Vryheer van Gierenburg ("The awful lock of Madacrestan, Baron of the town of Avarice") is the title of a Dutch "toverspel" (magic game or magic play), ostensibly by C.E. Boniface.

Occasionally Boniface published an advert in the South African Chronicle or De Zuid-Afrikaan announcing a number of titles for poems, prose works, and plays he intended publishing. This is one announced in 1837.

While these titles may simply have been meant as satirical commentary, F.C.L. Bosman argues that the texts may actually have been written, or Boniface fully intended to write them, but that they were never published and/or performed.

See Charles Etienne Boniface.