Martin Richard Clark Mr. William White Mr. John Cottrell. The respirator is now quite at the expiration of the rising of the vast region accessible to this discovery. He felt nearly certain that we do not forget your father's. I am very respectfully your humble servant, C. J. INGERSOLL. Rev. RUFUS W. GRISWOLD. _From C. J. Ingersoll._ FONTHILL, PHILADELPHIA, September, 30th, 1851. DEAR DOCTOR GRISWOLD:--I.