Just thinking out loud....
Is that a T in front of "lost with Samaritan"? As in Ticket?
I am wondering if it is, they are cancelling his Ticket number, as his actual ticket was lost in the sea.
The reports in the newspapers say the ship was lost on 22 Oct, 1846, and the 27 Oct, 1846 papers were already saying that apprentice Henry Threlfell and one other survived. That's a pretty short timeline to say he was lost.
Of course, he may never have gotten a new ticket..... I sure as heck wouldn't have put a foot on a ship again after that!