Silverthorns by Mary Louisa Molesworth — Read

There were difficulties to contend with. Lady Mildred, whose hospitable instincts were aroused, and who felt really anxious about the delicate little boy, would not hear of his leaving without the doctor's permission.

"He will be here directly," she said; but it was impossible for Mr Waldron to wait. He glanced at Claudia in a sort of despair. She understood him.