Seven o'clock
asked Noll , turning to that good woman . `` Ask Hal . '' `` In the Army it is customary to ask the ladies , Mother , '' Hal explained . `` Seven o'clock , then , '' said Mrs. Overton . `` Seven it shall be , '' nodded Noll . `` That is , if I do n't fail in coaxing Father and Mother out to dine . '' `` You wo n't fail , '' Mrs. Overton assured him .