Can scarcely credit it as yet.
Yankee-dom can hardly have fallen so low.
_Sunday, January 12th_ .-- Landed the discharged marine.

The news that Messrs.

Mason and Slidell have been given up appears to be confirmed.
The subtle diplomacy, notifying the Yankee Government _unofficially_, that the ultimatum would be withheld a short time, to allow them time to give up the prisoners _voluntarily_, was resorted to! The Yankee Consul here gave a dinner on the occasion! The Cadiz papers comment very unfavourably upon this back-down, and insist that notwithstanding, it is the duty of the great Powers to interpose and put an end to the war.

In the afternoon we got under way, and passing through the fleet of shipping, went up to the dock at Caracca, some eight miles east of the city.

The harbor is perfect, the water deep, and the buildings extensive.