Letter, from George Garden to Hans Sloane, dated at Aberdeen Details of child who, after having a stone cut from his bladder, was discovered with a flint stone shaped like a pistol within. Believes that the boy must have swallowed the flint stone. Re-counts another case of a man who voided a flint stone in his urine. Partially printed in 'Philosophical Transactions', vol 22, no 266, p 689 10 October 1698