A blow was shortly after inflicted on the royalty of Greece, from which it can never recover; but Lord Palmerston is accused of tolerating the use of forbidden weapons by some of his adherents, in his eagerness to make the Greek monarch sensible of the impolicy of the conduct of the Hellenic court. Attacks on the person of King Otho, more bold and unsparing than the most malignant vituperation of Junius, appeared in a London morning paper, then supposed to be allowed to imbibe some of its inspiration from Downing Street. These communications pretended to come from an anonymous correspondent in Athens, but it was evident the unknown writer was aware of many things that could hardly be known beyond the Bavarian court and the sanctuaries of Downing Street. At least, King Otho drew this conclusion, and apparently on good grounds. This correspondent informed the world, that his Hellenic Majesty, who had been selected by Lord Palmerston, and supported with a loan of £2,400,000, was nevertheless unfit to govern his kingdom; and that a certificate to this effect had been signed by several officers, civil, military, and medical, who were then at Athens in the service of King Otho, and that this certificate had been placed in the hands of King Louis of Bavaria. This strange communication would have passed unnoticed in Greece, had it not been made the subject of conversation by all the English officials, and the attention of Greek statesmen called to it by the British legation and consulates. At last, it was publicly noticed by the Greek press, and an outcry produced. Three of the Bavarians named as having signed the certificate, published a declaration contradicting the statement, in a document bearing date the 11th-23d June 1839, which was printed in the Greek newspapers. The medical and military officers who signed this counter-certificate were dismissed from all their places, and immediately quitted Greece. Very little has been said on this subject since. All parties seem heartily ashamed of their share in the transaction, and the public never discovered the key of the mystery. It is certain, however, that King Otho has given Lord Palmerston and Sir E. Lyons good proof of the falsity of the certificate, if they were ever led into the belief that such a document really existed; for, during ten years, he baffled them both in every diplomatic move, and made their vaunted constitutional policy tend more to the injury of their own reputation than to the diminution of his power.