Envelope containing slips of paper also found in Oberstein's study

There only remained an envelope with some small newspaper slips inside it. He shook them out on the table, and at once I saw by his eager face that his hopes had been raised.

“What’s this, Watson? Eh? What’s this? Record of a series of messages in the advertisements of a paper. Daily Telegraph agony column by the print and paper. Right-hand top corner of a page. No dates — but messages arrange themselves."
(See Letters, Telegrams and Notices etc.)