On the California coast, a steamboat's boiler explodes killing forty and injuring seventeen others
The small steamer Ada Hancock was used to transfer passengers from the wharf at the California port of San Pedro to ships laying offshore. On this day, she was carrying sixty passengers out to the steamship Senator when her boiler exploded. Forty of the sixty passengers were killed and all but seven of the remainder were injured. (By John Osborne)
"Terrible Steamboat Explosion," Washington (DC) National Republican, May 2, 1863, p. 2.