The Emperor was observed to pay marked attention to the troops of the line, the forty-seventh and the lancers; observing, as it is said, "your household troops are noble fellows; but what I wished particularly to see, were the troops with which you gained your victories in India and China." A speech of this kind was worthy of the sagacity of a man who knew where the true strength of a national army lies, and who probably, besides, has often had his glance turned to the dashing services of our soldiery in Asia. The household troops of every nation are select men, and the most showy which the country can supply. Thus they are nearly of equal excellence. The infantry of ours, it is true, have been always "fighting regiments"--the first in every expedition, and distinguished for the gallantry of their conduct in every field. The cavalry, though seldomer sent on foreign service, exhibited pre-eminent bravery in the Peninsula, and their charges at Waterloo were irresistible. But it is of the marching regiments that the actual "army" consists, and their character forms the character of the national arms. In the evening the Emperor and the King of Saxony dined with her Majesty at Windsor. THURSDAY. The royal party again drove to the Ascot course, and were received with the usual acclamations. The Emperor and King were in plain clothes, without decorations of any kind; Prince Albert wore the Windsor uniform. The cheers were loud for Wellington. The gold cup, value three hundred guineas, was the principal prize. Eight horses ran, and the cup was won by a colt of Lord Albemarle's. His lordship is lucky, at least on the turf. He won the cup at Ascot last year. FRIDAY. The royal party came to London by the railway. The Emperor spent the chief part of the day in paying visits, in the Russian ambassador's private carriage, to his personal friends--chiefly the families of those noblemen who had been ambassadors to Russia. SATURDAY.