John Bartlett (1820–1905). Familiar Quotations, 10th ed. 1919.
4689 Rihard Brinsley Sheridan 1751-1816 John Bartlett
| NUMBER: | 4689 |
| AUTHOR: | Richard Brinsley Sheridan (1751–1816) |
| QUOTATION: | Certainly nothing is unnatural that is not physically impossible. |
| ATTRIBUTION: | The Critic. Act ii. Sc. 1. |