We arrived in Plymouth Sound the next morning, and found assembled there about one hundred and twenty sail of merchantmen bound to various ports on the other side of the Atlantic, in the safe convoy of which to their destination we were to take part.  We also found my old ship _Colossus_, the frigate _Astarte_, of thirty-six guns, and two 14-gun-brigs--the _Hebe_ and the _Naiad_--at anchor outside the merchant fleet, being the remaining ships of the squadron detailed for convoy duty.