Palmerston's government held together until early in 1858, handling with vigor the various problems of Eastern policy which grew out of the Crimean War, waging the brief expeditionary wars with China and Persia, and dealing with characteristic decision and pluck with the great Sepoy Mutiny in India, in 1857. To Palmerston belongs the credit of selecting the right person in Sir Colin Campbell to restore the British power in the revolted provinces, and his ready optimism helped to nerve the nation in this year of trial. John Bull felt a new pride in "Old Pam" when, in his Mansion House speech, in this time of national foreboding, he served notice on any foreign nation whom it might concern that "it would not be a safe game to play to take advantage of that which is erroneously imagined to be the moment of our weakness." Palmerston's willingness to alter the English conspiracy laws for the sake of the Emperor of the French, whose life had been attempted by the assassin Orsini, cost him his official head in February, 1858. The second Derby administration which ensued lasted but fifteen months, giving way, in June of the following year, to Palmerston's second and last government, with a brilliant array of advisers; Earl Russell as Foreign Secretary, and Mr. William Ewart Gladstone as Chancellor of the Exchequer. The lifelong determination to spare nothing which might be required for the defense of his country was still strong within him, as is shown by his strenuous advocacy of increased armaments, better coast defenses, and more and more powerful ships. "He never ceased for a single moment to keep before the nation the great lesson that empires are kept as they are gained, by courage and self-reliance."