Since then every year upon the same date there has always appeared a similar box, containing a similar pearl, without any clue as to the sender.

They have been pronounced by an expert to be of a rare variety and of considerable value.

You can see for yourselves that they are very handsome." She opened a flat box as she spoke, and showed me six of the finest pearls that I had ever seen.
"Your statement is most interesting," said Sherlock Holmes.

"Has anything else occurred to you ?" "Yes, and no later than to-day.

That is why I have come to you.