Alexander Michie, The Siberian Overland Route from Peking to Petersburg…
“ The settlers in the river Angara are also exempted from taxes of all kinds, and from recruiting, on condition of their supplying government and private travellers with skilful pilots and guides, for which they are of course likewise well requited by those who employ them. This is necessary on the Angara, that river being one of the most dangerous in the world. ”
