The Confederate Cruisers lately at the jCape.—The arrival of the Vanderbilt at the Cape seems to have been the signal for the Confederate cruisers to beat a retreat from that quarter. The Georgia made off at once as if for the West Indies ; the Tuscaloosa, when last spoken, was apparently making in the same direction; and the Alabama, by letters received by this mail, seems to have as speedily stood to the eastward, for when the steamer left Galle her proximity to that port was felt to be anything but pleasant for the numerous [fleet of American vessels, both there and at Colombo. The mail steamer SJiunlee, which arrived at Colombo from Bombay on the 30th September, was chased by the Alabama, but on British colours being hoisted the Southerner stood away. It is reported she is en route for China waters. The Georgia arrived at Cherbourg on Friday evening for coals and supplies. This arrival gives colour to the report that she, in company with the Florida, intended cruising again in theAtlantic.