The abstract from the book by academician N.Ozeretskovsky
Travelling by Ladoga and Onego lakes
Though have not seen myself, but heard in Serdobol and several villages that in bad harvest years Karelians use rye straw for subsistence, which for this matter is finely chopped, dried in oven and then grounded by pestles producing some kind of flour that is used for bread baking, though always mixed with some part of oats flour. Coastal dwellers also tell that Karelians living near Swedish border, were places are mainly marshy forests, very often have goitres and for cure use the roots of Fumaria bulbosa that is called rust in that places. These roots are boiled in small amount of water and the resulting fluid is drank in big volumes helping so to get rid of those ugly goitres.
There is a big bay called Yanislahta that goeth to the north just after Lyaskilya river mouth. As this bay stretcheth far into mainland, to avoid long journey around it the way from Serdobol is usually by water to Leppinermy cape, then around two miles by feet to the churchyard at the apex of Impilahti bay and there goes a road to Olonets.
Just before Leppinermy cape close to the shore there is a small village Gunuk. Those going by vater have to double the cape to enter Impilahti bay that penetrates some 2 leagues into the mainland. A small river Galin-oya mouths the bay. Close to the apex of the bay there is a ling isle Kili-saari (Gouts Island) that all is made up of a stone reach of iron and ferropyrites. There are found big beautiful Apollo butterflies two of which I happen to catch there.
On the mountain on the other side of the mouth of Impilahti bay there is a Lutheran church. A priest and a chaplain live there. This township is the last were inhabitants are mainly of Lutheran belief. The inhabitants of the next Salmi township though also belonging to Serdobol circuit and same Karelians as in Impilahti and Ruskeala townships are all of Greek-Russian belief. In other Serdobol circuit townships the followers of this belief are rather seldom met.