His complete archives (published by Pauvert) show also that he wrote a letter asking the United States government, for the sake of their own reputation in the future, to spare John Brown's life, but the letter arrived after Brown was executed.
他的全集（由波维尔出版）显示他也向美国政府致函，称为了后者未来的名声，饶约翰·布朗一命，但信件寄到时布朗已经呜呼。