He attended only one reunion of his Rangers, in Alexandria, Virginia, in January 1895, noticing with bemusement how many had become clergymen but preferring to look forward not back. During the war, he had kept a slave, Aaron Burton, to whom he occasionally sent money in Brooklyn, New York after the war and with whom he kept in contact into the 1890s. In 1894, Mosby wrote to a former comrade regarding the cause of the war, stating: "I've always understood that we went to war on account of the thing we quarreled with the North about. I've never heard of any other cause than slavery."