I have not found either of these on ISTG.

Surname RATH, ERVIN, HENDERSON, said to have been passengers on Magnet- Belfast to America- when war of 1812 declared. Magnet (T. Drew Master) taken as Admiralty Prize by HMS Ringdove or HMS Emulous and passengers disembarked Halifax July 1812.

Any suggestions from knowledgeable monitors where these passenger manifests may be located.