"Dies Irae", is a Latin word of the Hymn on the Last Judgment, ascribed to Thomas of Celano (d. c. 1256) and once forming part of the office for the dead and requiem mass.
This is part of the website I've found and I believe it'll help you out to find the era composition: https://www.britannica.com/topic/Dies-irae
Hop this helps!
Beyond his personal success, Equiano's book made a vital contribution to the abolitionist cause. His story refuted many of the racist stereotypes and misconceptions that were prominent at the time as he gave the public an opportunity to see slavery through the eyes of a former slave. (Make sure to write this in your own words! :) )
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sorry I'm late
I'm answering cause I felt bad abt the fact that noone answered u. Have a great morning or night!
Where did the publisher get the story from? did they make it theirself? when did they publish it ? to what extent? and is this a reliable resource?