figure waving the hat. Hannibal Collins, a freed slave, is one of the oarsman. Copes 1994, p. 63. Roosevelt 2004, pp. 144-144. Roosevelt 2004, pp. 260−261
Cambridge Alumni Database. University of Cambridge. R C Lehmann "The Complete Oarsman. Online Library eBooks Read .com. [2020-10-11]. (原始内容存档于2021-02-24) (英语)
feared for his life. The Guardian. 2003-04-05: 28. Longmore, Andrew. Oarsman is thrown in at deep end. The Sunday Times. 2003-04-06 [2021-03-22]. (原始内容存档于2016-03-04)