In a comment posted on an answer to the question, 'Does modern scholarship accept an Ethiopian origin for Egyptian hieroglyphs?', the user that posted the question wrote:
"The oldest kingdom in Africa was located in Ta seti. The area is
called Qutsul [sic!], "The land of the bow". It had the earliest
hieroglyphic inscriptions ever found, and guess what, this kingdom was
located in Sudan."
The claim that the earliest hieroglyphic inscriptions ever found originated at Qustul (and that Egyptian civilisation therefore "must have originated in Ancient Nubia, and spread from South to North") is frequently repeated by others on the Internet (for example, in 'They Hail From the South: The Qustul Censer', and in this post from the forum on GrahamHancock.com, Re:3800-3100 B.C. Qustul.
Is this claim true? Specifically, when and where were the earliest hieroglyphs yet discovered found?
If they were not found in Qustul in Ancient Nubia, why do so many people claim that they were?