[12]Henry Louis Gates Jr.：12 Years a Slave: Trek From Slave to Screen, see http://www.theroot.com/articles/history/2013/10/solomon_northup_trek_of_his_book_12_years_a_slave_to_the_big_screen.html
[13]David Fiske, Solomon Northup: His Life Before and After Slavery, (Lexington, KY: Published by Author, 2012), 31.
[14]Ira Berlin, 「Introduction; Solomon Northup: A Life and Message,」 in Solomon Northup: Twelve Years A Slave, ed. Henry Louis Gates, Jr., (New York, NY: Penguin Group Inc., 2012), xxiv.
[15]所有譯文參見《為奴十二載》，北京大學出版社，2013年版。
[16]諾索普重獲自由回到北方之後沒幾個月就開始向Wilson口述，所以他的記憶還十分鮮活。
[17]諾索普書中說，「這兩條披著羊皮的狼，狡猾殘忍的怪物，他們以金錢為餌，蓄意引誘我遠離家鄉和親人，遠離自由。讀者朋友們，他們難道不該為我遭受的苦難負責任嗎？如果不是因為他們善於偽裝，我才受到矇騙，我怎麼會莫名其妙地失蹤呢？」這樣的控訴也確實引起反響。一個讀者 Thaddeus St. John讀過《為奴十二載》之後想起他遇到Alexander Merrill和Joseph Russell二人的經歷。在他的幫助下，諾索普於1854年將這兩個當年綁架販賣他的人告上法庭。據二人供認，當年販賣諾索普獲得了650美元。但最終，二人還是被無罪釋放。
[18]Philip S. Foner, Introduction to Twelve Years A Slave, by Solomon Northup, (Mineola, NY: Dover Publications, Inc., 1970, iii.
[19]Baldwin, James. "Everybody's Protest Novel." The Norton Anthology of African American Literature. Ed. Henry Louis Gates Jr. and Nellie Y. McKay. New York: Norton, 1997. 1654-59.
[20]Harriet Beecher Stowe, The Key to Uncle Tom’s Cabin, NY, Arno Press Inc.,1968,174.
[21]David S. Reynolds, Mightier Than the Sword: Uncle Tom’s Cabin and the Battle for America, (New York, NY: W. W. Norton & Company, 2011), 124
[22]Frankie Hutton. The Early Black Press in America, 1827 to 1860. Westport, CT: Greenwood Press, 1993
[23]Carol Wilson. Freedom at Risk: The Kidnapping of Free Blacks in America, 1780-1865. Lexington: University of Kentucky, 1994.
[24]http://www.newyorker.com/online/blogs/culture/2014/03/the-historian-who-unearthed-twelve-years-a-slave.html.
[25]「現在我的故事已經來到了一個轉折點，那些輕鬆的、光明的描述已經夠多的了，我該說一說我和提比茨老爺的第二次交鋒，以及我穿過佩克德裡沼澤逃亡的經歷了。」書中這樣的語句，可以表明他的敘事自覺性。
[26]http://harpers.org/blog/2014/02/in-the-margins-of-twelve-years-a-slave/.
[27]http://newyorkhistoryblog.org/2013/11/13/authenticity-and-authorship-of-solomon-northups-12-years-a-slave/.