 Range, along the Great Silk Route to Tash-Rabat and Lake Chatyr-Kul.They went until Kashgar and then via Pass Irkeshtam and back to Osh.Expeditions conducted with his younger brother Lieutenant M. Y. Grigory Grum-Grshimailo between 1889 and 1890 were intended to bring back specimens of Przewalski's horse .