[I don't] care a twopenny damn what [becomes] of the ashes of Napoleon Bonaparte.
Source, in full
As quoted in The Times [London] (9 October 1944); this attribution probably originates in a letter by Thomas Babington Macaulay, 1st Baron Macaulay (6 March 1849), in which he states "How they settle the matter I care not, as the duke says, one twopenny damn."