"Why, dog my cats, they must a ben a house-full o' niggers in there every night for four weeks to a done all that work, Sister Phelps." — Mark Twain, "Adventures of Huckleberry Finn", 1884
I began to feel sorry for Hubby, dog my cats if I didn't. — O. Henry, "The Four Million", 1906
and standing on one leg beside the bath, like Slingsby, had whispered: "Ho, ho, ho! Dog my cats!" mysteriously, to bring luck. — John Galsworthy, The Forsyte Saga, "Awakening", 1920