Mr. Walker cannot proceed on his mission to China, because there is not a steam frigate in our navy—at home—fit to carry him.— He should take the overland journey. Where is Mr. Porter with his aeroport ? Here is a fine opportunity for him to do his country some service. Let him carry Mr. Walker in his balloon at once to the seat of the war among the Celestials, and bring back a cargo of the best see-oo-chop-shong, to pay all expenses.