Birch tar | Deciduous Forests of Central Russia
Birch tar is the main component in a classic perfume recipe: the smoky leather ‘cuir de Russie’ which got its name because of the Cossacks who chased Napoleon out of Russia all the way to Paris only to facsinate the Parisians with how they looked, behaved and… smelled.
Cossacks, being a cavalry army, would wear long soft leather boots which they would treat with birch tar for shine, flexibility and waterproof effect. Ultimately, Tonnerre is more cuir de Russie than any perfume on the market at the moment as perfumers pushed the birch tar content as high as modern regulations would allow for their outstanding smoky "burning ships/gunpowder smoke accord".
1805 Tonnerre by Beaufort