Thank you, Halpark, for your kind reply. I'm guessing you must have access to check all masters tickets? I'm open to the idea of my William not having been a captain, but would it have been likely for a crewman to have his family sailing with him?
Apparently, Catherine had to wait some years for her husband, William, to be officially declared dead, so I'm not expecting to find that he was ever brought ashore for burial.
The "beautiful state rooms" was mentioned by a relative in a letter, relating his memories of Catherine to one of her descendants, so very well could have been elaborated. He did mention, though, that she brought back exotic things which, if true, would indicate William did more than just coasting.
Thank you so much again for this information. :)