Project to find use of may in Agatha Christie.

1       .Wait--I must warn you. There may be a risk--if I've been followed.

2."Nothing--except that I think I may be of some use to you."

3. "It may catch him," she murmured. "Anyway, it's worth trying."

    4. "Excuse me," it said. "But may I speak to you for a moment?"

5."I'm carrying papers-- vitally important papers. They may make all the difference to the war.