“There’s no use watching any more today,” said Mollie. “Most of the fires start during the middle of the day. It is very seldom that I can pick a new one after sundown. There are exceptions to the rule, though. Several years ago there was a maniac who went from one place to another in the forest starting fires. They would break out in the most unexpected places at the most unusual times. It was weeks before we were sure that they were being willfully started, but there was no other explanation which would explain the succession of fires at most extraordinary times. We finally caught the miscreant and that ended further trouble from that source.”