The Barnum Family, 1350-1907 mistakenly shows him as a child of his grandfather.
On 31 Dec 1873 a US Passport was issued to Frank Barnum. He was described as 24 years old, 5 feet 5-3/4 inches tall, broad forehead, blue eyes, straight nose, large mouth, round chin, Dark brown hair, medium complexion, and round face.
In 1918 and 1920 he was living in Lugano, Switzerland.
Uremia (prerenal azotemia) is an abnormally high level of nitrogen-type wastes in the blood. It is somewhat common, especially in people who are confined to the hospital.