four o'clock
When many girls clustered round her with their gay jokes , they became convulsed with laughter at her comic replies . It was arranged by Mrs. Haddo that Betty and her two sisters were to start for the Mileses ' farm at three o'clock exactly . It would not take them more than half an hour to walk there . Mrs. Miles was requested to give them tea not later than four o'clock , and they were to be called for at half-past four . Thus they would be back at Haddo Court about five . `` Only two hours ! '' thought Betty to herself .