This article leads to some interesting reading about Oxhide Ingots (https://en.wikipedia.org/wiki/Oxhide_ingot https://en.wikipedia.org/wiki/Oxhide_ingot), and

This article leads to some interesting reading about Oxhide Ingots (https://en.wikipedia.org/wiki/Oxhide_ingot https://en.wikipedia.org/wiki/Oxhide_ingot), and how this shipwreck was the biggest find (?) of these so far. And you, probably like me, had a hard time not reading "Copper Oxide"