18th. We got very thirsty crossing the mountains but the water tasted earthy even though it was flowing out of snow and ice, of which there was plenty. The Lapp cut out some ice with his knife and sucked the water from the ice itself. It tasted excellent and he and I drank well. He said it was good for the chest. Pure water is never harmful even if one drinks it cold as long as it is drunk in moderation. I learned this from the Lapps and from my own experience.