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In page Carl Gustav Rehnskiöld:

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A few days later Lewenhaupt proposed, first to Piper and later to Rehnskiöld, that they should reconcile so that their hostile relationship would not affect the other Swedish officers. In the presence of Swedish generals and colonels, Rehnskiöld and Piper settled their differences. Both remained in Moscow and established a collaboration to help the Swedish prisoners of war and satisfy their interests. With the approval of the Russian authorities they established a management office in the city, through which all contact with the Swedish authorities was routed. They worked hard to raise money for the Swedish prisoners through funds sent from the State Treasury in Stockholm; however, over the years these transfers became increasingly sporadic.[3][4][6]