POST ISAAC, CORNWALL,.—Several fishing boats proceeded to sea on the morning of the 7th February, the weather being fine and the sea comparatively smooth.

At about 11 A,M., however, a tremendous ground sea arose, almost suddenly, and the boats were in great danger, and could not for several hours venture to enter the harbour.

The Miehwrd and Sarah Life-boat went to their rescue, towed in four of the boats, containing seven men, and accompanied the others in entering the harbour..