In 1792, the French Astronomer Guillaume le Gentil went to India to observe the Transit of Venus.
He missed the first one, and the next one wouldn’t show for several more years. So he decided to stay behind and wait for the next one … and his observatory promptly suffered bad weather and he observed nothing. This almost drove him insane, but he managed to regain his sanity and return to France.
When he returned to France he found he was declared legally dead. His estate was plundered by relatives, his position at The Royal Academy was filled by someone else, and his wife remarried. The King stepped in and rectified the first and second problem, and Guillaume handled the third one by remarrying.
What’s the Catholic Protocol on missing spouses? If someone’s wife remarries because she thinks she’s a widow, then which husband is she really married to.