DRAMATIS PERSONAE.
| Professor Braintree | A famous scientist |
| Miss Tuckey | His secretary |
| Dr. Locum | His medical attendant |
| Elfrida | His granddaughter |
| Bird-in-Hand | A thing to be explained |
| Professor Braintree | A famous scientist |
| Miss Tuckey | His secretary |
| Dr. Locum | His medical attendant |
| Elfrida | His granddaughter |
| Bird-in-Hand | A thing to be explained |