Under the Red Robe by Stanley J. Weyman

I took from my breast a little packet wrapped in soft leather, and I held it towards her.

'Will you open this? ' I said. 'I believe that it contains what your brother lost. That it contains all I will not answer, Mademoiselle, because I spilled the stones on the floor of my room, and I may have failed to find some. But the others can be recovered; I know where they are.'