Bill Carmody
Mary }
Nora } _his children_
Tom }
Billy }
Doctor Gaynor
Fred Nicholls
Eileen Carmody, _Bill's eldest child_
Stephen Murray
Miss Howard, _a nurse in training_
Miss Gilpin, _superintendent of the Infirmary_
Doctor Stanton, _of the Hill Farm Sanatorium_
Doctor Simms, _his assistant_
Mr. Sloan
Peters, _a patient_
Mrs. Turner, _matron of the Sanatorium_
Miss Bailey }
Mrs. Abner } _Patients_
Flynn }
Other Patients of the Sanatorium
Mrs. Brennan
(_The characters are named in the order in which they appear_)