From Pow-Wows, or Long Lost Friend, by John George Hoffman, [1820], we have this “very good remedy” for kidney stones (the gravel).

The author of this book, John George Hohman, applied this remedy, and soon felt relieved. I knew a man who could find no relief from the medicine of any doctor; he then used the following remedy, to wit:

he ate every morning seven peach-stones before tasting anything else, which relieved him very much;

but as he had the gravel very bad, he was obliged to use it constantly. I, Hoffman, have used it for several weeks. I still feel a touch of it now and then, yet I had it so badly that I cried out aloud every time that I had to make water. I owe a thousand thanks to God and the person who told me of this remedy.