Add [[Category:Pearl, sailed Fall, 1773]] above the "== Biography ==" line. I've now done this.
An easy shortcut is to use the category finder tool (it looks like rectangles joined by lines) in the toolbox just below where it says "Edit Text" on the edit page. Just click that and enter "Pearl" (in this case) to search for the category you want.
Edited to add: Sorry, Shirlea, I misspelled your name in the change explanation. It was auto-correct that did it, I swear:-)