The following case report presents a unique instance in which sizable multiple gallstones disappeared during a four-year interval without any history of biliary colic, jaundice, or other episode that would suggest the formation of a fistula between the gallbladder and some other part of the intestinal tract. Report of a Case The patient was a 65-year-old man, who in 1953 had complained of pain in the left side of the chest on slight exertion, with radiation down the left arm. Because of this precordial distress he was unable to perform his routine duties. On three occasions in 1953 and 1954 the patient had to be hospitalized for paroxysms of rapid auricular tachycardia or fibrillation. At the time of the paroxysms he experienced severe precordial distress and his blood pressure dropped to hypotensive levels. On each occasion the paroxysms of tachycardia were converted within a few hours to regular rhythm by