In 1842 the excavator, Fossati, wrote to Gennarelli a detailed description of his discovery of the Vulci hoard with its fragments of a bull-bull bar and a cock-rostra bar. This includes a description of its proximity to the bridge and the jar in which it was found. Thankfully for us Gennarelli published that letter.
Excellent photos of La Bruna (CHRR 16) bars acquired by Berlin as well as some superb etching of other aes grave can be found in Dressel 1894.
Liv Mariah Yarrow 