“ He again set out in 1822 with the design of making the circuit of the world, but after travelling through Russia into Siberia, he was suspected of being a spy, was arrested when he had managed to penetrate 1000 m. beyond Smolensk, and after being conducted to the frontiers of Poland, returned home by Austria, Saxony, Prussia and Hanover. He now issued Travels through Russia, Siberia, &c. ”