Twenty minutes later, she came up with 179 pebbles and an empty box. She was concerned she'd miscounted them, not ending at 180, so Kitty began again before continuing with anything else. This time, she found herself at 186.
Ugh.
An hour and a half later, along with a lot more meticulous counting, Kitty was convinced: There were 185 pebbles. Now, what else had been in that box...?