It was mid-afternoon by the old sun-dial that marked the hours in Warwick Hall garden; a sunny afternoon in May. The usual busy routine of school work was going on inside the great Hall, but no whisper of it disturbed the quiet of the sleepy old garden. At intervals the faint clang of the call-bell, signalling a change of classes, floated through the open windows, but no buzz of recitations reached the hedge-hidden path where Betty Lewis sat writing.