A letter to Mr. Felix Warburg by the Agudas Chassidei Chabad Nusach Ari organization in the US written on 7 Tammuz 1927/5687. Five (5) days before the Rebbe's release. He was then in Kostrama, Russia, where he was supposed to spend 3 years. After having his death sentence commuted to ten, five and then three years. In the end he was released on 12/13 Tammuz and left Russia on Motzoei Simchas Torah 5688.