▁of ▁medieval ▁mag icians ▁and ▁w itch es . ▁ ▁Der en ▁developed ▁the ▁film ▁over ▁a ▁period ▁of ▁one ▁month , ▁last ing ▁from ▁August ▁to ▁September ▁ 1 9 4 3 . ▁However , ▁long ▁after ▁principal ▁phot ography ▁for ▁the ▁film ▁comm enced , ▁she ▁abandoned ▁the ▁project , ▁leaving ▁the ▁film ▁incomplete . ▁Some ▁of ▁the ▁film ' s ▁out t akes ▁were ▁found ▁and ▁stored ▁at ▁the ▁Anth ology ▁Film ▁Archives , ▁while ▁several ▁sequences ▁that ▁were ▁shot ▁appear ▁to ▁be ▁lost . ▁Sur v iving ▁sh ots ▁from ▁the ▁film ▁are ▁mostly ▁semi - ed ited ▁sequences , ▁including ▁one ▁particular ▁sequence ▁that ▁Der en ▁had ▁engine ered ▁during ▁post - production ▁to ▁be ▁played ▁backwards . ▁ ▁See ▁also ▁ ▁Ex perimental ▁film ▁ ▁Lost ▁film ▁ ▁References ▁ ▁Bibli ography ▁ ▁External ▁links ▁ ▁Category : 1 9 4 4 ▁short ▁films ▁Category : 1 9 4 0 s ▁un fin ished ▁films ▁Category : 1 9 4 0 s ▁avant - gar de ▁and ▁experimental ▁films ▁Category : American ▁films ▁Category : American ▁silent ▁short ▁films ▁Category : American ▁avant - gar de ▁and ▁experimental ▁films ▁Category : American ▁black - and - white ▁films ▁Category : Fil ms ▁directed ▁by ▁May a ▁Der en <0x0A> </s> ▁{{ T ax obox ▁| ▁color ▁= ▁light gre y ▁| ▁name ▁= ▁Cup ri avid us ▁t ai wan ensis ▁| ▁reg num ▁= ▁B acter ia ▁| ▁ph yl um ▁= ▁Prote ob acter ia