In the year 1670, the duke was supposed to be concerned in Blood's attempt on the life of the duke of Ormond. This scheme was to have conveyed that nobleman to Tyburn, and there to have hanged him; for which purpose he was taken out of his coach in St. James's Street, and carried away by Blood and his son beyond Devonshire House, Piccadilly, but then rescued. Blood afterwards endeavoured to steal the crown out of the Tower, but was seized; however, he was not only pardoned, but had an estate of five hundred pounds a year given him in Ireland, and admitted into an intimacy with the King. The reason of Blood's malice against the duke of Ormond was, because his estate at Sorney was forfeited for his treason in the course of government, and must have been done by any lord lieutenant whatever. This, together with the instigation of some enemy of the duke of Ormond's at court, wrought upon him so, that he undertook the assassination. Mr. Carte supposes, that no man was more likely to encourage Blood in this attempt, than the duke of Buckingham, who, he says was the most profligate man of his time, and had so little honour in him, that he would engage in any scheme to gratify an irregular passion. The duke of Ormond had acted with some severity against him, when he was detected in the attempt of unhinging the government, which had excited so much resentment, as to vent itself in this manner. Mr. Carte likewise charges the duchess of Cleveland with conspiring against Ormond, but has given no reasons why he thinks she instigated the attempt. The duchess was cousin to the duke of Buckingham, but it appears in the Annals of Gallantry of those times, that she never loved him, nor is it probable she engaged with him in so dangerous a scheme.