A Lot More to Find Out: I also noticed that the birds would sit in the sun...

“ I also noticed that the birds would sit in the sun when it favored our mountain with its light, and I, being awfully vitamin minded at the time, wondered if they were gathering vitamin D. To be on the safe side, in view of this, I sat in the sun too when it was out. So did Frightful. My Side of the Mountain by Jean Craighead George