The current issue I'm particularly looking at is the http://www.uesp.net/wiki/Lore:Gray_Cowl_of_Nocturnal. I understand that the curse bestowed upon the cowl by Nocturnal, which erased the name of the cowl's owner from the history books and from mortal memory, "was broken in 3E 433, when Count Corvus Umbranox, the contemporary Gray Fox, organised the theft of an Elder Scroll from the Imperial Library in the Imperial Palace."1
What I'm unsure about is what impact the events of 3E 433 had on those who had previously worn the cowl, and, by extension, whether the curse (in its unbroken state, prior to 3E 433), was a permanent effect for those who had ever donned the cowl. Put simply, if someone were to have put on the cowl, would their name have been erased from the history books forever, even after removing the cowl, and would this effect have remained permanent for that person, until such time as the curse was broken in 3E 433?
I plan to write about an OC's brief experience of wearing the Gray Cowl of Nocturnal, and how their former life was deleted from history because of the curse. The events in my fan-fic will occur sometime during the 300 years between 3E 433, when the curse was broken, and 3E 133, which I extrapolate to be when Emer Dareloth stole the Gray Cowl from Nocturnal.
Does this sound about right? Would the curse on the Cowl affect anyone who dons the Cowl, whether or not they are a thief, or the Guildmaster of the Thieves Guild? And if the curse did affect them, would it remain permanent even after the Cowl was removed?
1http://www.uesp.net/wiki/Lore:Gray_Cowl_of_Nocturnal — UESP Wiki