“It is currently kept in the British Museum”
aka Museum of Stolen Goods ;-)
That’s pretty hilarious. Although without looking it up I would bet the first use of writing would have been ownership documents and transactions
The earliest documents we have are lists, but I think it's hard to tell whether you're looking at a shopping list, an inventory, or what. Early scripts tend to be logographic for this reason, if you mostly write stuff like "Ten Amphoras of wine" then a symbol which means "Amphora of wine" seems pretty much as useful as a way to write numbers.