Aspects of this topic are discussed in the following places at Britannica.
...137 miles [220 km] north-northeast) about 1804, Muhamman Makau, sarkin (“king of”) Zazzau, led many of the Hausa nobility to the Koro town of Zuba (6 miles [10 km] south). Abu Ja (Jatau), his brother and successor as sarkin Zazzau, founded Abuja town in 1828, began construction of its wall a year later, and proclaimed himself the first emir of Abuja....
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