Complex sentence: George Frederic made a number of grants to various foreign groups; one of the most famous was the grant of a huge tract he made to Gregor MacGregor in 1820, an area called Poyais, which encompassed lands once granted by George I to some Englishmen.
Split into simpler sentences: George Frederic made a number of grants to various foreign groups. One of the most famous bestowals was the grant of a huge tract he made to Gregor MacGregor in 1820, an area called Poyais, which encompassed lands once granted by George I to some Englishmen.